Physics 504 Chapter 12 & 13 Different Types of ForcesNeil MacIntosh
1. The document discusses different types of forces including gravitational, normal, tension, and friction.
2. It provides equations for calculating resultant, centripetal, and frictional forces.
3. Examples are given to demonstrate calculating the force of friction for a skidding car and the forces on an object on an inclined plane.
This document discusses force and motion. It defines force as a push or pull that causes an object to change its motion. It lists several types of forces: air resistance, applied, spring, frictional, gravitational, electrical, normal, and magnetic. For each force it provides a brief definition. It defines motion as a change in an object's position over time. It explains that balanced forces result in no motion, while unbalanced forces can change an object's motion. The net force on an object is the combination of all individual forces acting on it. Gravity is defined as the force of attraction between all objects, depending on their masses and distance between them.
This document defines force and explains Newton's laws of motion. It identifies different types of forces, including contact forces (frictional and normal forces) and non-contact forces. Examples are given to illustrate pushing, pulling, gravity, and other forces. Methods for measuring, drawing, and calculating the resultant of multiple forces are described. Frictional force and its properties are explained, along with examples of its advantages and disadvantages. The key differences between weight and mass are defined, and equations show their relationship based on gravitational acceleration.
Forces can move objects, change their direction of motion, change their shape, or stop them. There are different types of forces including magnetic force, gravitational force, and frictional force. Magnetic force pulls iron objects towards magnets. Gravitational force is caused by the Earth's pull and causes all objects to fall. Frictional force opposes motion between surfaces and can slow or stop moving objects.
1) Sir Isaac Newton studied motion and is best known for his laws of motion and universal law of gravitation.
2) Forces can cause objects to start or stop moving, change direction, or maintain constant motion depending on whether the net force is balanced or unbalanced.
3) Friction opposes the motion of objects in contact and depends on factors like the nature of the surfaces and the pressing force between them. It exists as both static and kinetic forms.
The document discusses the concepts of force, pressure, and friction. It defines force as a push or pull and describes several examples. It also explains how forces can change the speed, direction, or shape of an object. The document addresses some common misconceptions people have about these concepts and provides explanations to clarify them. It concludes by discussing the relationship between force and pressure and giving some examples of friction.
1) Force is a push or pull that can change the motion, speed, or shape of an object. It is an interaction between two objects.
2) The effects of force include temporarily or permanently changing an object's shape, changing the direction or speed of motion, and stopping or starting motion.
3) Friction occurs when two surfaces contact each other and can slow motion, cause wear, and improve traction. It is influenced by factors like surface condition and weight.
1. The document discusses Isaac Newton and his work on motion and forces. It explains Aristotle's view of motion requiring force versus Galileo's view that objects naturally continue in motion without force.
2. Forces can cause objects to start or stop moving, change direction, or maintain constant motion depending on whether the net force is balanced or unbalanced. Contact forces like applied force, normal force, and friction oppose motion while gravity acts from a distance.
3. Free body diagrams use arrows to represent all forces acting on an object and their magnitudes and directions to analyze motion. Friction opposes the relative motion between two surfaces in contact.
Physics 504 Chapter 12 & 13 Different Types of ForcesNeil MacIntosh
1. The document discusses different types of forces including gravitational, normal, tension, and friction.
2. It provides equations for calculating resultant, centripetal, and frictional forces.
3. Examples are given to demonstrate calculating the force of friction for a skidding car and the forces on an object on an inclined plane.
This document discusses force and motion. It defines force as a push or pull that causes an object to change its motion. It lists several types of forces: air resistance, applied, spring, frictional, gravitational, electrical, normal, and magnetic. For each force it provides a brief definition. It defines motion as a change in an object's position over time. It explains that balanced forces result in no motion, while unbalanced forces can change an object's motion. The net force on an object is the combination of all individual forces acting on it. Gravity is defined as the force of attraction between all objects, depending on their masses and distance between them.
This document defines force and explains Newton's laws of motion. It identifies different types of forces, including contact forces (frictional and normal forces) and non-contact forces. Examples are given to illustrate pushing, pulling, gravity, and other forces. Methods for measuring, drawing, and calculating the resultant of multiple forces are described. Frictional force and its properties are explained, along with examples of its advantages and disadvantages. The key differences between weight and mass are defined, and equations show their relationship based on gravitational acceleration.
Forces can move objects, change their direction of motion, change their shape, or stop them. There are different types of forces including magnetic force, gravitational force, and frictional force. Magnetic force pulls iron objects towards magnets. Gravitational force is caused by the Earth's pull and causes all objects to fall. Frictional force opposes motion between surfaces and can slow or stop moving objects.
1) Sir Isaac Newton studied motion and is best known for his laws of motion and universal law of gravitation.
2) Forces can cause objects to start or stop moving, change direction, or maintain constant motion depending on whether the net force is balanced or unbalanced.
3) Friction opposes the motion of objects in contact and depends on factors like the nature of the surfaces and the pressing force between them. It exists as both static and kinetic forms.
The document discusses the concepts of force, pressure, and friction. It defines force as a push or pull and describes several examples. It also explains how forces can change the speed, direction, or shape of an object. The document addresses some common misconceptions people have about these concepts and provides explanations to clarify them. It concludes by discussing the relationship between force and pressure and giving some examples of friction.
1) Force is a push or pull that can change the motion, speed, or shape of an object. It is an interaction between two objects.
2) The effects of force include temporarily or permanently changing an object's shape, changing the direction or speed of motion, and stopping or starting motion.
3) Friction occurs when two surfaces contact each other and can slow motion, cause wear, and improve traction. It is influenced by factors like surface condition and weight.
1. The document discusses Isaac Newton and his work on motion and forces. It explains Aristotle's view of motion requiring force versus Galileo's view that objects naturally continue in motion without force.
2. Forces can cause objects to start or stop moving, change direction, or maintain constant motion depending on whether the net force is balanced or unbalanced. Contact forces like applied force, normal force, and friction oppose motion while gravity acts from a distance.
3. Free body diagrams use arrows to represent all forces acting on an object and their magnitudes and directions to analyze motion. Friction opposes the relative motion between two surfaces in contact.
1. Explain turning effect of force,with examples of daily life
2. Define Moment of force
3. Express Moment of force with proper unit
4. Solve simple problems based on formula for pressure
5. Define Pressure
6. Express pressure in proper units
7. Solve simple Problems based on formula pressure
8. Explanation of Pressure exerted by atmosphere
This document discusses different types of forces. It defines push and pull forces and provides examples. It explains that a force is a push or pull and defines the Newton as the SI unit of force. It discusses that an interaction between two objects results in a force and provides an example of pushing an ice cream cart. It also discusses net force, magnitude and direction of forces. The document further explains how forces can cause motion, change speed or direction of an object. It distinguishes between contact forces like muscular force and friction, and non-contact forces like magnetic and gravitational forces. It defines pressure and its relationship to force and area. It also discusses atmospheric pressure and how it balances pressure inside our bodies.
First Law of Motion: The Law of Inertia
An object at rest tends to stay at rest, and an object in motion tends to stay in motion with the same speed and in the same direction, unless acted upon by an external net force (unbalanced force)
This document defines and explains various types of forces including vector forces, Newtons as a unit of force measurement, net force as the sum of all forces acting on an object, and the effects of balanced and unbalanced forces. It also discusses elastic forces like compression and tension, friction which opposes motion, and equilibrium as a state where balanced forces cause no changes in motion. Types of friction like static, sliding, rolling, and fluid friction are defined with examples.
Forces and motion are discussed in this document. It defines a force as a push or pull and explains that all motion is due to forces acting on objects. Motion is defined as a change in an object's position over time. Balanced and unbalanced forces are compared, with unbalanced forces being able to cause motion. Common forces like gravity, friction, and air resistance are described. Examples are provided to illustrate key concepts around forces.
Friends you will know about the different forces around us and some interesting question, its a short ppt on forces related to physics.. hope you would like..!!
This document discusses balanced and unbalanced forces and their effects on objects. It defines force as a push or pull and explains that forces have both size and direction, measured in Newtons. It states that when the sum of forces acting on an object equals zero, the forces are balanced, which results in no change in the object's velocity. However, if the sum is non-zero, the forces are unbalanced, which produces a change in the object's motion, such as its speed or direction. Examples of unbalanced forces include kicking a soccer ball or arm wrestling.
Forces act on objects in different ways:
1. Forces are pushes or pulls that can cause an object to start or stop moving in a certain direction.
2. If the forces on an object are balanced, the object will remain at rest or maintain a constant speed and direction of motion.
3. If forces are unbalanced, the object will accelerate in the direction of the greater net force.
Forces can start, stop, or change the motion of objects. There are two main types of forces - contact forces, which require touching objects, like pushing or pulling, and non-contact forces, which act over a distance without touching, like magnetic or gravitational forces. Forces are measured in units called newtons. Forces can be balanced, where opposing forces cancel each other out, or unbalanced, where a net force causes motion or changes the motion of an object. Mass is a measure of the amount of matter in an object, while weight is the force of gravity acting on an object's mass.
Friction opposes the direction of motion. It is desirable for walking and driving but undesirable when it prevents intended motion. The types of friction are static, kinetic, and rolling. Static friction prevents motion while kinetic friction occurs during sliding. Both depend on the normal force and coefficients of friction that vary based on the materials in contact.
This document discusses the concept of forces in physics. It defines a force as a push or pull on an object and explains that forces are vectors that have both magnitude and direction. There are four main forces in nature: gravity, electromagnetism, the strong nuclear force, and the weak nuclear force. Dynamics and statics are introduced as areas of study related to forces and motion. Newton's three laws of motion are outlined. Common ways of measuring mass and examples of force problems are provided, including free body diagrams, friction, inclined planes, and pulleys.
Forces can be categorized as either contact forces or non-contact forces. Contact forces require physical contact between objects and include applied forces, normal forces, friction, tension, and spring forces. Non-contact forces do not require physical contact and include gravitational, magnetic, and electrostatic forces. Pressure is defined as the force applied per unit area and is measured in Pascals. Factors like magnitude of force and contact area determine the level of pressure, with high pressure applications including hydraulic systems and low pressure applications including building foundations and snow shoes.
1) A force is a push or pull that can be measured in Newtons. Forces can combine and act in the same or opposite directions. Friction is a force that slows or prevents motion and depends on surface roughness and weight.
2) Gravity is the force of attraction between objects with mass. Newton's three laws of motion describe how forces affect motion. An object at rest or in motion stays at rest or in motion unless acted upon by an unbalanced force. The greater the mass of an object, the greater the force needed to accelerate or decelerate it. For every action force, there is an equal and opposite reaction force.
3) Centripetal force pulls objects toward the center of a
Forces can be categorized as either contact forces or non-contact forces. Contact forces require direct physical contact between objects and include applied force, normal force, friction, tension, and spring force. Non-contact forces act over a distance and include gravitational force, electrical force, and magnetic force. A net force is the single force equivalent to multiple forces acting on an object. An unbalanced net force will cause acceleration, while a balanced net force where forces are equal will not change an object's motion. Common units for measuring force include the newton.
This document discusses different types of forces. It explains that gravity, the ground, air, and your own body exert forces on you at all times. Forces can cause objects to move, change speed or direction. Gravity pulls objects down, while surfaces push up. Friction opposes motion and can slow or stop objects. Net force is calculated by adding or subtracting different forces on an object. Balanced forces result in no motion, while unbalanced forces cause motion.
Forces and motion were discussed. A force is a push or pull that can cause changes in an object's motion by affecting its position, direction, speed, or acceleration. Newton's three laws of motion state that an object at rest stays at rest and an object in motion stays in motion unless acted on by an unbalanced force, acceleration depends on mass and applied force, and for every action there is an equal and opposite reaction. Simple machines like levers, pulleys, and inclined planes make work easier by trading force for distance.
This document discusses key concepts around motion and forces including:
1) It defines speed, velocity, and the difference between the two.
2) It explains that unbalanced forces cause changes in an object's velocity or acceleration, while balanced forces do not cause changes.
3) It describes different types of friction including static, sliding, rolling, and fluid friction and factors that affect friction.
The document is a unit assessment on force and motion concepts. It contains 10 multiple choice questions testing definitions of key terms like force, motion, gravity, and Newton's Laws. The assessment instructs students to write down answers and check them against the answer key provided at the end to check their understanding.
- The document discusses Newton's laws of motion and the concepts of force, inertia, mass, and momentum.
- Newton's first law states that objects resist changes to their motion unless acted upon by an unbalanced force. His second law establishes a relationship between force, mass, and acceleration.
- Momentum is defined as the product of an object's mass and velocity, and Newton showed that a larger force is needed to stop an object with greater momentum according to his second law.
The document discusses different types of forces and friction. It begins by asking about balanced and unbalanced forces on a book sitting on a desk. It then lists several scenarios involving objects in motion and asks about their similarities. It defines friction as the force between two surfaces in contact and notes that the amount of friction is affected by how hard the surfaces push together and their material. It outlines four types of friction - static, sliding, rolling, and fluid friction - and provides examples of each type.
Friction opposes the motion of objects and is caused by bumps on surfaces sticking together when they touch. There are three main types of friction: static friction between non-moving surfaces, sliding friction between surfaces moving past each other, and rolling friction between rolling objects and surfaces. Adding sand to tires increases rolling friction and helps cars move on slippery surfaces by providing more traction between the tires and the ground. This relates to Newton's Second Law, as increasing friction generates a greater net force to overcome inertia according to the formula F=ma.
1. Explain turning effect of force,with examples of daily life
2. Define Moment of force
3. Express Moment of force with proper unit
4. Solve simple problems based on formula for pressure
5. Define Pressure
6. Express pressure in proper units
7. Solve simple Problems based on formula pressure
8. Explanation of Pressure exerted by atmosphere
This document discusses different types of forces. It defines push and pull forces and provides examples. It explains that a force is a push or pull and defines the Newton as the SI unit of force. It discusses that an interaction between two objects results in a force and provides an example of pushing an ice cream cart. It also discusses net force, magnitude and direction of forces. The document further explains how forces can cause motion, change speed or direction of an object. It distinguishes between contact forces like muscular force and friction, and non-contact forces like magnetic and gravitational forces. It defines pressure and its relationship to force and area. It also discusses atmospheric pressure and how it balances pressure inside our bodies.
First Law of Motion: The Law of Inertia
An object at rest tends to stay at rest, and an object in motion tends to stay in motion with the same speed and in the same direction, unless acted upon by an external net force (unbalanced force)
This document defines and explains various types of forces including vector forces, Newtons as a unit of force measurement, net force as the sum of all forces acting on an object, and the effects of balanced and unbalanced forces. It also discusses elastic forces like compression and tension, friction which opposes motion, and equilibrium as a state where balanced forces cause no changes in motion. Types of friction like static, sliding, rolling, and fluid friction are defined with examples.
Forces and motion are discussed in this document. It defines a force as a push or pull and explains that all motion is due to forces acting on objects. Motion is defined as a change in an object's position over time. Balanced and unbalanced forces are compared, with unbalanced forces being able to cause motion. Common forces like gravity, friction, and air resistance are described. Examples are provided to illustrate key concepts around forces.
Friends you will know about the different forces around us and some interesting question, its a short ppt on forces related to physics.. hope you would like..!!
This document discusses balanced and unbalanced forces and their effects on objects. It defines force as a push or pull and explains that forces have both size and direction, measured in Newtons. It states that when the sum of forces acting on an object equals zero, the forces are balanced, which results in no change in the object's velocity. However, if the sum is non-zero, the forces are unbalanced, which produces a change in the object's motion, such as its speed or direction. Examples of unbalanced forces include kicking a soccer ball or arm wrestling.
Forces act on objects in different ways:
1. Forces are pushes or pulls that can cause an object to start or stop moving in a certain direction.
2. If the forces on an object are balanced, the object will remain at rest or maintain a constant speed and direction of motion.
3. If forces are unbalanced, the object will accelerate in the direction of the greater net force.
Forces can start, stop, or change the motion of objects. There are two main types of forces - contact forces, which require touching objects, like pushing or pulling, and non-contact forces, which act over a distance without touching, like magnetic or gravitational forces. Forces are measured in units called newtons. Forces can be balanced, where opposing forces cancel each other out, or unbalanced, where a net force causes motion or changes the motion of an object. Mass is a measure of the amount of matter in an object, while weight is the force of gravity acting on an object's mass.
Friction opposes the direction of motion. It is desirable for walking and driving but undesirable when it prevents intended motion. The types of friction are static, kinetic, and rolling. Static friction prevents motion while kinetic friction occurs during sliding. Both depend on the normal force and coefficients of friction that vary based on the materials in contact.
This document discusses the concept of forces in physics. It defines a force as a push or pull on an object and explains that forces are vectors that have both magnitude and direction. There are four main forces in nature: gravity, electromagnetism, the strong nuclear force, and the weak nuclear force. Dynamics and statics are introduced as areas of study related to forces and motion. Newton's three laws of motion are outlined. Common ways of measuring mass and examples of force problems are provided, including free body diagrams, friction, inclined planes, and pulleys.
Forces can be categorized as either contact forces or non-contact forces. Contact forces require physical contact between objects and include applied forces, normal forces, friction, tension, and spring forces. Non-contact forces do not require physical contact and include gravitational, magnetic, and electrostatic forces. Pressure is defined as the force applied per unit area and is measured in Pascals. Factors like magnitude of force and contact area determine the level of pressure, with high pressure applications including hydraulic systems and low pressure applications including building foundations and snow shoes.
1) A force is a push or pull that can be measured in Newtons. Forces can combine and act in the same or opposite directions. Friction is a force that slows or prevents motion and depends on surface roughness and weight.
2) Gravity is the force of attraction between objects with mass. Newton's three laws of motion describe how forces affect motion. An object at rest or in motion stays at rest or in motion unless acted upon by an unbalanced force. The greater the mass of an object, the greater the force needed to accelerate or decelerate it. For every action force, there is an equal and opposite reaction force.
3) Centripetal force pulls objects toward the center of a
Forces can be categorized as either contact forces or non-contact forces. Contact forces require direct physical contact between objects and include applied force, normal force, friction, tension, and spring force. Non-contact forces act over a distance and include gravitational force, electrical force, and magnetic force. A net force is the single force equivalent to multiple forces acting on an object. An unbalanced net force will cause acceleration, while a balanced net force where forces are equal will not change an object's motion. Common units for measuring force include the newton.
This document discusses different types of forces. It explains that gravity, the ground, air, and your own body exert forces on you at all times. Forces can cause objects to move, change speed or direction. Gravity pulls objects down, while surfaces push up. Friction opposes motion and can slow or stop objects. Net force is calculated by adding or subtracting different forces on an object. Balanced forces result in no motion, while unbalanced forces cause motion.
Forces and motion were discussed. A force is a push or pull that can cause changes in an object's motion by affecting its position, direction, speed, or acceleration. Newton's three laws of motion state that an object at rest stays at rest and an object in motion stays in motion unless acted on by an unbalanced force, acceleration depends on mass and applied force, and for every action there is an equal and opposite reaction. Simple machines like levers, pulleys, and inclined planes make work easier by trading force for distance.
This document discusses key concepts around motion and forces including:
1) It defines speed, velocity, and the difference between the two.
2) It explains that unbalanced forces cause changes in an object's velocity or acceleration, while balanced forces do not cause changes.
3) It describes different types of friction including static, sliding, rolling, and fluid friction and factors that affect friction.
The document is a unit assessment on force and motion concepts. It contains 10 multiple choice questions testing definitions of key terms like force, motion, gravity, and Newton's Laws. The assessment instructs students to write down answers and check them against the answer key provided at the end to check their understanding.
- The document discusses Newton's laws of motion and the concepts of force, inertia, mass, and momentum.
- Newton's first law states that objects resist changes to their motion unless acted upon by an unbalanced force. His second law establishes a relationship between force, mass, and acceleration.
- Momentum is defined as the product of an object's mass and velocity, and Newton showed that a larger force is needed to stop an object with greater momentum according to his second law.
The document discusses different types of forces and friction. It begins by asking about balanced and unbalanced forces on a book sitting on a desk. It then lists several scenarios involving objects in motion and asks about their similarities. It defines friction as the force between two surfaces in contact and notes that the amount of friction is affected by how hard the surfaces push together and their material. It outlines four types of friction - static, sliding, rolling, and fluid friction - and provides examples of each type.
Friction opposes the motion of objects and is caused by bumps on surfaces sticking together when they touch. There are three main types of friction: static friction between non-moving surfaces, sliding friction between surfaces moving past each other, and rolling friction between rolling objects and surfaces. Adding sand to tires increases rolling friction and helps cars move on slippery surfaces by providing more traction between the tires and the ground. This relates to Newton's Second Law, as increasing friction generates a greater net force to overcome inertia according to the formula F=ma.
Friction is a force that opposes the relative motion between two objects in contact. There are two main types of friction: static friction and kinetic friction. Friction can be both helpful and harmful. It allows for walking and braking a bicycle but also causes wear and tear over time. Friction depends on factors like the roughness and weight of surfaces, and it can be increased or decreased through these surface properties.
Friction is the force that opposes the relative motion between two surfaces in contact. It always acts in the direction opposite to the motion or intended motion of an object. The document discusses different types of friction including static friction, sliding friction, rolling friction, and fluid friction. It explains how friction can be both advantageous and disadvantageous, and how it can be increased or decreased through factors like the smoothness of surfaces, use of lubricants, and the introduction of rolling motion using wheels or ball bearings.
This document discusses friction, including its causes and types. Friction is the force that resists motion between two objects in contact. It is caused by uneven surfaces on the objects, with tiny particles from one surface embedding in the other when rubbed together. There are two main types of friction: dry friction between solid surfaces, and fluid friction between lubricated surfaces. Static friction is higher than kinetic friction and acts when surfaces are not moving relative to each other, while dynamic or kinetic friction acts when surfaces are moving relative to each other. The amount of friction depends on factors like the contact materials and surface smoothness, and is proportional to the force pressing the surfaces together.
Habit Summit 2015 : Reduce Friction To Increase EngagementKintan Brahmbhatt
Friction refers to the forces that resist motion between objects in contact. In user experience, friction describes any barriers that make it difficult for users to complete tasks or achieve their goals on a website or app. This document discusses sources of friction like unnecessary effort, unnatural context switching, and complex decisions. It provides examples of how services like Amazon reduce friction by automating tasks, anticipating user needs, and simplifying choices. While reducing friction can encourage more usage, it may not be sufficient alone and should be used carefully to avoid negative consequences.
Friction is the force that resists the relative motion of two surfaces in contact. It is caused by surface irregularities that get caught on one another. Friction has both advantages, like allowing us to walk and use tools, and disadvantages, such as generating heat and wasting energy in machines. Methods to reduce friction include polishing surfaces, lubrication, streamlining, and using ball bearings. Increasing friction can be done by adding substances like sand, spikes, or coarse textures that improve grip.
Friction is a force that opposes the relative motion between two surfaces in contact. The amount of friction depends on the type of surfaces and the force pressing them together. Friction can be beneficial by allowing us to grip objects, but also harmful as it causes wear and reduces efficiency. Rough surfaces have more friction than smooth surfaces due to more contact points. Friction converts kinetic energy into thermal energy, and lubricants can reduce friction to improve machine efficiency.
The document discusses friction, including its various types and how it relates to forces. It defines static and kinetic friction, explains how friction forces are calculated using coefficients of friction, and shows examples of friction forces for different materials. The document also explores how friction forces change relative to applied forces and transitions from static to kinetic friction. It demonstrates how normal forces and maximum static friction forces are used to determine if an object will begin sliding or not.
This document discusses friction and lubrication in metal forming processes. It describes two models of friction - the Coulomb friction model which applies at normal stresses below the workpiece's flow stress, and the Tresca friction model at higher normal stresses. The key lubrication mechanisms are also outlined, including dry lubrication, hydrodynamic lubrication using high-speed fluid films, and boundary film lubrication preferred for sheet metal forming. Methods for measuring friction coefficients like the ring test and double cup extrusion test are also presented.
Friction is the force that opposes the relative motion between two surfaces in contact. There are different types of friction including static, sliding, fluid, and rolling friction. Friction can be beneficial by allowing us to walk or write, but it also has disadvantages as it causes wear and increases energy consumption. Methods to reduce friction include lubrication, decreasing contact area, polishing surfaces, and streamlining objects.
Friction is the force resisting the relative motion of two surfaces in contact. There are different types of friction including dry friction, fluid friction, and internal friction. Dry friction occurs between two solid surfaces and includes static friction between non-moving surfaces and kinetic friction between moving surfaces. The document then discusses the theory of friction in more detail, explaining the normal force, coefficient of friction, angle of friction, and applications of friction in transportation, measurement, and household usage.
1. The document discusses different forms of energy including kinetic energy, gravitational potential energy, chemical energy, and others. It provides examples and equations for calculating kinetic energy and gravitational potential energy.
2. The principle of conservation of energy is explained as energy changing from one form to another but never being created or destroyed. Examples are given of energy conversions from one form to another.
3. Problem sets provide calculations for determining kinetic energy, gravitational potential energy, and applying the conservation of energy principle when energy is transferred between potential and kinetic forms.
Friction is a force between two surfaces in contact that opposes their sliding or moving past each other. The amount of friction depends on the materials the surfaces are made of, with rougher surfaces producing more friction. Friction produces heat and can be useful to prevent slipping, but sometimes needs to be reduced, like with lubrication between engine parts or streamlining vehicles to reduce air resistance.
Friction is the resistance to motion when one solid body moves over another in contact. There are two main types of friction: dry friction and fluid friction. Dry friction, also called Coulomb friction, occurs between two dry surfaces in contact. Fluid friction occurs between layers of a fluid moving at different velocities.
The document discusses the mechanisms and theories of friction. It explains that friction arises from interactions between surface asperities or roughness. The dominant mechanisms are adhesion between contact areas and plastic deformation. Adhesion contributes to friction through the force needed to overcome molecular bonds between contacting asperities. Deformation friction is the energy required for plastic plowing or deformation of asperities. The total friction force is the sum
Case study of pakistan international airline(pia) downfallsTauseef Gillani
PIA was founded in 1955 through the merger of Orient Airways and the government of Pakistan. It grew to become Asia's best airline but has struggled financially in recent decades due to aging aircraft, high fuel costs, unnecessary political recruitment, and liberal traffic rights given to foreign competitors without reciprocity. A recent committee review found PIA losses had reached $142 billion with too many employees, general managers, and flights on unprofitable routes due to political pressure. The management lacks a clear business plan and vision for turning PIA around.
The document discusses the advantages and disadvantages of friction. It notes that friction allows for walking without slipping, driving cars without skidding, and writing with pencils. However, it also notes friction causes wear and tear of shoes and tires over time. Friction produces heat, such as when lighting a match. While necessary for many functions, friction also reduces efficiency of machines and motion.
Friction is a force that opposes the relative motion between two surfaces in contact. It arises due to interlocking irregularities between the surfaces on a microscopic level. Friction can be static, sliding, or rolling depending on whether an object is at rest, moving, or rolling respectively. The factors that affect friction include the nature of the surfaces, how hard they are pressed together, and their relative smoothness or roughness. While friction is necessary for important functions like walking and driving, it also leads to energy loss in machines. Efforts to reduce friction include lubrication, use of rolling elements like wheels and bearings, and streamlining shapes in fluids.
Friction. Do you know what is friction and how it plays different roles in our general life. There are many section in our life where friction is necessary like - in playing sitar and guitar, walking on the road and to hold something in our hand or in any mechanical devices. But there are many field where friction is not required like - in machines where two surfaces meet at a point. Due to this the life of the machine parts get decreased and failure may be occur there. Know more about different laws of friction, types of friction, elimination of the friction.
Friction is the force that opposes the motion of objects in contact with one another. It causes objects to slow down and stop moving even without an apparent force being applied. Friction occurs due to bumps and hollows between surfaces and is greater on rougher surfaces, causing slower motion. While friction has disadvantages like causing wear and reducing efficiency, it also has advantages such as enabling brakes to stop moving vehicles and allowing objects to be gripped. Friction can be reduced by smoothing surfaces or adding lubricants between surfaces.
This document discusses forces, friction, and coefficients of friction. It explains that friction opposes motion and causes objects to slow down without a continuous application of force. It also discusses the normal force being perpendicular to surfaces and defining the coefficient of friction as the ratio of the friction force to the normal force. Examples are provided of coefficients of friction for different surface combinations and how friction allows objects to stay on roads when rounding curves at certain speeds due to the maximum static friction force.
The document discusses Newton's laws of motion through examples and activities. It begins by introducing inertia and having students relate experiences of sudden stops or starts in vehicles. Several activities are described to illustrate inertia, such as placing a coin on paper and removing the paper quickly. The document then summarizes Newton's three laws of motion, defines key terms like force, mass, and acceleration, and provides examples of how the laws apply in various situations like throwing a ball or stubbing a toe.
1) The document summarizes key concepts from a physics class including friction, rolling without slipping, Newton's second law, and drag forces.
2) It provides examples of calculating static and kinetic friction forces on objects, as well as the maximum force needed to start an object slipping.
3) Rolling friction and drag forces from fluids like air are also discussed, with examples of how cross-sectional area and speed affect drag force.
This document discusses forces, friction, and air resistance. It begins by reviewing an example of a sliding book slowing down due to friction forces. It then covers key concepts like Newton's 3rd law, static and kinetic friction, coefficients of friction, and how friction and air resistance affect motion. Examples are provided to illustrate how friction allows objects to remain at rest or travel at constant velocity on an inclined plane and how air resistance limits projectile range and causes objects to reach a terminal velocity when falling. Homework assignments involving further reading and problems related to these topics are outlined at the end.
Friction is the force that opposes the relative motion between two objects in contact. There are different types of friction including static, kinetic, sliding, rolling, and fluid friction. Static friction acts on objects at rest and can be modeled using the coefficient of static friction. Kinetic friction acts on moving objects and is typically less than static friction. It can be modeled using the coefficient of kinetic friction. Friction plays an important role in physics problems involving inclined planes and motion.
This document provides information about Newton's laws of motion. It discusses Newton's first law of inertia, which states that an object at rest stays at rest and an object in motion stays in motion unless acted upon by an unbalanced force. It also discusses Newton's second law, which defines the relationship between force, mass and acceleration using the equation F=ma. Examples are given to illustrate both laws, such as how an unbalanced force like gravity would cause a golf ball at rest to accelerate once hit, or how different masses would require different forces to accelerate at the same rate.
This document explains Isaac Newton's three laws of motion through examples and diagrams. Newton's First Law states that objects at rest stay at rest and objects in motion stay in motion unless acted upon by an unbalanced force. Friction and gravity are examples of forces that cause moving objects to eventually stop. Newton's Second Law states that force equals mass times acceleration (F=ma). Newton's Third Law says that for every action there is an equal and opposite reaction - when one object exerts a force on a second object, the second object exerts an equal force back on the first.
Newton's laws of motion describe the relationship between an object and the forces acting upon it, and its response to those forces. The three laws are:
1) An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
2) The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the direction of the net force, and inversely proportional to the mass of the object.
3) For every action, there is an equal and opposite reaction.
The document provides explanations and examples of these laws, different types of forces including contact
Newton's three laws of motion are summarized as follows:
1. An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
2. The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.
3. For every action, there is an equal and opposite reaction.
Newton's three laws of motion are summarized as follows:
1) An object at rest stays at rest and an object in motion stays in motion unless acted upon by an unbalanced force.
2) The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.
3) For every action, there is an equal and opposite reaction.
Newton's three laws of motion are summarized as follows:
1) Newton's First Law states that objects at rest will stay at rest and objects in motion will stay in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
2) Newton's Second Law establishes the relationship between an object's mass, its acceleration, and the applied force as F=ma.
3) Newton's Third Law describes that for every action force there is an equal and opposite reaction force.
Newton's three laws of motion are summarized as follows:
1) Newton's First Law states that objects at rest will stay at rest and objects in motion will stay in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
2) Newton's Second Law establishes the relationship between an object's mass, its acceleration, and the applied force as F=ma.
3) Newton's Third Law describes that for every action force there is an equal and opposite reaction force.
Newton's three laws of motion are summarized as follows:
1) An object at rest stays at rest and an object in motion stays in motion unless acted upon by an unbalanced force.
2) The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.
3) For every action, there is an equal and opposite reaction.
This document discusses Isaac Newton's three laws of motion and related concepts like inertia, balanced forces, unbalanced forces, and gravity. Newton's three laws are: 1) Objects at rest tend to stay at rest and objects in motion tend to stay in motion unless acted upon by an unbalanced force. 2) Force equals mass times acceleration. 3) For every action there is an equal and opposite reaction. The document provides examples and explanations of how these laws apply to real-world situations like a ball rolling to a stop due to friction or an object in space propelling itself back to a shuttle by throwing an object.
Objects in motion will remain in motion and objects at rest will remain at rest unless acted on by an unbalanced force. Things stop moving due to forces like friction and gravity. Newton's laws state that (1) objects resist changes in motion, (2) force equals mass times acceleration, and (3) for every action there is an equal and opposite reaction.
The document discusses forces of friction and gravity. It begins with an agenda for the lesson, which includes demonstrations on friction, notes on friction and gravity, and an activity. The notes define friction as the force that opposes the sliding motion of surfaces in contact, and gravity as the force that attracts objects toward each other. It describes how mass and distance affect the gravitational force between objects. Friction and gravity can both affect the speed and direction of an object. The lesson concludes with challenges applying understanding of balance and center of gravity.
- Dynamics studies the causes of motion rather than just describing motion like kinematics. There are four fundamental forces - gravitation, electromagnetism, weak nuclear force, and strong nuclear force. Forces can be applied, thrust, weight, normal, elastic, tension, friction, air resistance, electric, or magnetic.
- Newton's three laws of motion are: 1) An object at rest stays at rest or an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force. 2) The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, inversely proportional to the mass of the object. 3)
This document discusses Isaac Newton's major contributions and laws of motion. It covers:
- Newton formulated calculus, discovered that white light is composed of rainbow colors, invented the reflecting telescope, established the laws of motion, and developed the theory of universal gravitation.
- Newton's First Law states that an object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
- Newton's Second Law states that the acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object
this slide serves as a guidance to learners, in terms of knowledge and critical thinking. lastly it tells about the foundation of motion. lastly learners can use this knowledge to their reality
This document discusses Isaac Newton's major contributions and laws of motion. It covers:
- Newton formulated calculus, discovered that white light is composed of rainbow colors, invented the reflecting telescope, established the laws of motion, and developed the theory of universal gravitation.
- Newton's First Law states that an object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
- Newton's Second Law states that the acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object
Walmart Business+ and Spark Good for Nonprofits.pdfTechSoup
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Exploiting Artificial Intelligence for Empowering Researchers and Faculty, In...Dr. Vinod Kumar Kanvaria
Exploiting Artificial Intelligence for Empowering Researchers and Faculty,
International FDP on Fundamentals of Research in Social Sciences
at Integral University, Lucknow, 06.06.2024
By Dr. Vinod Kumar Kanvaria
Strategies for Effective Upskilling is a presentation by Chinwendu Peace in a Your Skill Boost Masterclass organisation by the Excellence Foundation for South Sudan on 08th and 09th June 2024 from 1 PM to 3 PM on each day.
How to Manage Your Lost Opportunities in Odoo 17 CRMCeline George
Odoo 17 CRM allows us to track why we lose sales opportunities with "Lost Reasons." This helps analyze our sales process and identify areas for improvement. Here's how to configure lost reasons in Odoo 17 CRM
Executive Directors Chat Leveraging AI for Diversity, Equity, and InclusionTechSoup
Let’s explore the intersection of technology and equity in the final session of our DEI series. Discover how AI tools, like ChatGPT, can be used to support and enhance your nonprofit's DEI initiatives. Participants will gain insights into practical AI applications and get tips for leveraging technology to advance their DEI goals.
This presentation was provided by Steph Pollock of The American Psychological Association’s Journals Program, and Damita Snow, of The American Society of Civil Engineers (ASCE), for the initial session of NISO's 2024 Training Series "DEIA in the Scholarly Landscape." Session One: 'Setting Expectations: a DEIA Primer,' was held June 6, 2024.
How to Setup Warehouse & Location in Odoo 17 InventoryCeline George
In this slide, we'll explore how to set up warehouses and locations in Odoo 17 Inventory. This will help us manage our stock effectively, track inventory levels, and streamline warehouse operations.
This slide is special for master students (MIBS & MIFB) in UUM. Also useful for readers who are interested in the topic of contemporary Islamic banking.
3. 3
Sliding Book Example
• Why do things not continue to move at
constant velocity?
• If the sliding book slows down, what’s
the force responsible?
– How could I keep it moving at a constant
velocity?
– Do I need to apply a force to keep it
moving? Why?
FrictionFriction
FrictionFriction
A net force of zeroA net force of zero
No, Inertia keeps the object moving!No, Inertia keeps the object moving!
4. 4
Forces are Vectors so
Directions are Important
Force #1
Force #2
Force #1Force #2
Total Force
Total Force = 0
5. 5
Newton’s 3rd
Law
For every action , there is an
equal and opposite reaction.
ForceForce onon NewtonNewton byby Einstein = ForceEinstein = Force onon EinsteinEinstein byby NewtonNewton
Newton tries to outsmart EinsteinNewton tries to outsmart Einstein
by loading his own cart with lead bricks)by loading his own cart with lead bricks)
6. 6
Friction opposes Motion
Force on person
by box
Force on floor by box Force on box
by floor
It’s the sum of all the forces that determines the type of motion.
Force on box
by personAccelerationAcceleration
What kind of motion is created by Unbalanced Net Force?
7. 7
Friction due to the Surface
Corrugations in the surfaces grind when things slide.Corrugations in the surfaces grind when things slide.
Lubricants fill in the gaps and let things slide more easily.Lubricants fill in the gaps and let things slide more easily.
How does the corrugated surface change Friction?How does the corrugated surface change Friction?
8. 8
Why Doesn’t Gravity Make the Box Fall?
Force of Earth acting on Box (weight)Force of Earth acting on Box (weight)
Force of Floor acting on BoxForce of Floor acting on Box
Force from floorForce from floor
on boxon box
and gravity = Netand gravity = Net
Force of zero.Force of zero.
If the floorIf the floor
vanished, thevanished, the
box would begin tobox would begin to
fall.fall.
9. 9
What’s Forces are not shown?What’s Forces are not shown?
Force on person
by box
Force on floor by box Force on box
by floor
Force on box
by person
The Normal Force and the Force of GravityThe Normal Force and the Force of Gravity
10. 10
• When we drew the box and floor,
with the “normal” force and the
force of gravity, these weren’t
strictly force pairs
– forces on the box that result in a Net
zero acceleration of the box
• The real pairs have to involve the
earth:
box
floor
earth
satellite
• Force Pairs:
• earth-box (grav)
• box-floor (contact)
• earth-satellite (grav)
11. 11
QuestionsQuestions
• Does friction always exert a force
that tends to bring things to a halt?
• What does this say about the
direction of the frictional force,
relative to the velocity vector?
• What do you think would happen if
we loaded lead bricks into the box?
Would it become harder to slide?
• What are some ways to reduce
frictional forces?
• Does friction always exert a force
that tends to bring things to a halt?
• What does this say about the
direction of the frictional force,
relative to the velocity vector?
• What do you think would happen if
we loaded lead bricks into the box?
Would it become harder to slide?
• What are some ways to reduce
frictional forces?
NONO
Friction vector isFriction vector is
opposite inopposite in
direction ofdirection of
motionmotion
YesYes
Lubrication, change surface,Lubrication, change surface,
reduce normal forcereduce normal force
12. 12
Static and Sliding
(Dynamic) Friction
Static and Sliding
(Dynamic) Friction
• Static frictional force: when nothing is
sliding
• Sliding frictional force: when surfaces
are sliding
• Static frictional forces always greater
than sliding ones
• Static frictional force: when nothing is
sliding
• Sliding frictional force: when surfaces
are sliding
• Static frictional forces always greater
than sliding ones
14. 14
“Normal” Forces and
Frictional Forces
Weight of block
Decompose Vector
Normal
Force
Friction
Force
Weight of block
Reaction Force
From Ramp
“Normal” means
perpendicular
Friction Force = Normal Force × (coefficient of friction)
Ffriction = µ⋅Fnormal
15. 15
Coefficient of Friction
Material on Material µs = static friction µk = kinetic friction
steel / steel 0.6 0.4
add grease to steel 0.1 0.05
metal / ice 0.022 0.02
brake lining / iron 0.4 0.3
tire / dry pavement 0.9 0.8
tire / wet pavement 0.8 0.7
16. 16
Stay on the road!
• What does it take to stay on the road
around a curve?
– using µs = 0.8 as average for tires on road, Ffriction
= 0.8mg
• (Normal force is just mg on level surface)
Fcurve = macurve = m×v2
/r
• where r is radius of curve, say 50 m (e.g., cloverleaf
exit ramp)
• Got enough friction if Fcurve < Ffriction
– happens if v2
< 0.8gr, or v < 20 m/s = 44 m.p.h.
17. 17
Air Resistance
• We’re always “neglecting air
resistance” in physics
– Can be difficult to deal with
• Affects projectile motion
– Friction force opposes velocity
through medium
– Imposes horizontal force,
additional vertical forces
– Terminal velocity for falling
objects
• Dominant energy drain on
cars, bicyclists, planes
18. 18
Summary
– Every force has an equal, opposing
force
– Friction opposes motion, requiring
continued application of force to
maintain constant velocity
– Air resistance produces terminal
velocity, alters trajectories of
projectiles (for the worse).