I taught elementary and engineering physics (algebra based) at Texas State University in San Marcos, Texas. I made this slide show really quick for a friend. I'll be adding more classical mechanics slideshows in the future.
Drawing Free Body Diagrams for Engineering Staticsanita74117
ย
I taught physics at Texas State University (elementary and algebra-based). This is a slide show I put together quickly for a friend. I'll be ading more, mostly on classical physics.
Drawing Free Body Diagrams for Engineering Staticsanita74117
ย
This slide show is a work in progress. I am putting together a short introduction to drawing free body diagrams for physics and engineering problems. Hint - learn Newton's 3rd law first. It makes learning the other two a breeze. I'll be updating and adding slide shows soon.
Drawing Free Body Diagrams for Engineering Staticsanita74117
ย
This is a quick slide show I put together for a friend. I'll have more to come. I taught elementary and engineering physics (algebra based) at Texas State University in San Marcos. Most of the slide shows I plan to do will be physics related
Free-body diagrams represent objects and the forces acting on them as vectors. They are useful for analyzing equilibrium situations where the net force on an object equals zero. There are several types of forces that may act on an object including normal force, tension, friction, and weight. Normal force is perpendicular to the surface an object rests on, tension is a pulling force from a rope or string, and friction opposes motion between two surfaces in contact.
The document discusses key concepts in dynamics including different types of forces like normal force and friction. It explains Newton's laws of motion and how they can be applied to solve dynamics problems. Examples are provided on how to use the laws of motion to analyze inclined planes, lifts, tensions in connected objects, and other dynamics scenarios. Key concepts covered in 3 sentences or less include: Newton's laws of motion are introduced to explain how forces cause motion or changes in motion. Different types of forces like normal force, friction, and tension are defined. Examples are given on how to apply Newton's laws to solve dynamics problems involving inclined planes, connected objects, and lifts.
1) Inertia is the tendency of an object to resist changes in its motion. Mass is a measure of an object's inertia, with more massive objects being harder to accelerate or decelerate.
2) Newton's second law states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. This relationship can be expressed as F=ma.
3) Newton's third law states that for every action force there is an equal and opposite reaction force. Forces always occur in action-reaction pairs between interacting objects.
The document discusses Newton's laws of motion. It provides background on Aristotle and Galileo's views, introduces Newton and his three laws, and gives examples of each law in action. Key points include Newton's first law of inertia, his second law relating force, mass and acceleration, and examples of problems applying the second law.
Drawing Free Body Diagrams for Engineering Staticsanita74117
ย
I taught physics at Texas State University (elementary and algebra-based). This is a slide show I put together quickly for a friend. I'll be ading more, mostly on classical physics.
Drawing Free Body Diagrams for Engineering Staticsanita74117
ย
This slide show is a work in progress. I am putting together a short introduction to drawing free body diagrams for physics and engineering problems. Hint - learn Newton's 3rd law first. It makes learning the other two a breeze. I'll be updating and adding slide shows soon.
Drawing Free Body Diagrams for Engineering Staticsanita74117
ย
This is a quick slide show I put together for a friend. I'll have more to come. I taught elementary and engineering physics (algebra based) at Texas State University in San Marcos. Most of the slide shows I plan to do will be physics related
Free-body diagrams represent objects and the forces acting on them as vectors. They are useful for analyzing equilibrium situations where the net force on an object equals zero. There are several types of forces that may act on an object including normal force, tension, friction, and weight. Normal force is perpendicular to the surface an object rests on, tension is a pulling force from a rope or string, and friction opposes motion between two surfaces in contact.
The document discusses key concepts in dynamics including different types of forces like normal force and friction. It explains Newton's laws of motion and how they can be applied to solve dynamics problems. Examples are provided on how to use the laws of motion to analyze inclined planes, lifts, tensions in connected objects, and other dynamics scenarios. Key concepts covered in 3 sentences or less include: Newton's laws of motion are introduced to explain how forces cause motion or changes in motion. Different types of forces like normal force, friction, and tension are defined. Examples are given on how to apply Newton's laws to solve dynamics problems involving inclined planes, connected objects, and lifts.
1) Inertia is the tendency of an object to resist changes in its motion. Mass is a measure of an object's inertia, with more massive objects being harder to accelerate or decelerate.
2) Newton's second law states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. This relationship can be expressed as F=ma.
3) Newton's third law states that for every action force there is an equal and opposite reaction force. Forces always occur in action-reaction pairs between interacting objects.
The document discusses Newton's laws of motion. It provides background on Aristotle and Galileo's views, introduces Newton and his three laws, and gives examples of each law in action. Key points include Newton's first law of inertia, his second law relating force, mass and acceleration, and examples of problems applying the second law.
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.
The document discusses key concepts in mechanics including:
1. Free body diagrams show only the external forces acting on an object and are useful for solving dynamics problems.
2. Newton's Second Law states that acceleration is proportional to net force and inversely proportional to mass.
3. Impulse is the product of force and time and equals change in momentum, affecting how objects move after collisions or other impacts.
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.
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
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.
1) Three boxes with masses m1 = 45 kg, m2 = 22 kg, and m3 = 33 kg are resting on a horizontal surface without friction. A horizontal force F of 50 N pushes the boxes to the right.
2) Applying Newton's Second Law to each box yields an acceleration of 0.5 m/s^2 for all boxes.
3) The force exerted by m2 on m3 is 27.5 N, and the force exerted by m1 on m2 is also 27.5 N.
- A force is a push or pull on an object due to its interaction with other objects. Common forces include gravity, normal force, tension, friction, electromagnetic force, and contact force.
- Forces are represented by arrows, with the length proportional to the magnitude. Forces can be added vectorially to find the net/resultant force. If the net force is nonzero, the object will accelerate. If it's zero, the object will maintain a constant velocity or remain at rest.
- For every action there is an equal and opposite reaction. The forces due to interactions between two objects are always equal in magnitude and opposite in direction.
Newton's laws of motion by Mphiriseni Khwandamkhwanda
ย
Newton's Laws of Motion document summarizes Newton's three laws of motion. It discusses Newton's first law, stating that objects at rest stay at rest and objects in motion stay in motion with constant velocity unless acted upon by an unbalanced force. It addresses misconceptions about the first law. Newton's second law states that acceleration is directly proportional to net force and inversely proportional to mass. Problems are provided applying the laws, including drawing free-body diagrams and solving equations of motion. Newton's third law is not discussed.
This document discusses representation in physics, specifically focusing on free-body diagrams. It defines what a free-body diagram is and provides examples of drawing them to represent different forces like weight, tension, and contact forces. Key examples include a person standing, a hanging picture, and boats being towed. The document also discusses the effects of friction, like how it allows cars and feet to move forward, and the factors that influence the amount of friction between surfaces.
With this mantra success is sure to come your way. At APEX INSTITUTE we strive our best to realize the Alchemist's dream of turning 'base metal' into 'gold'.
The forces acting on the box are:
1. Applied force (Fa) by the boy pulling the rope towards the right.
2. Frictional force (Ff) by the floor on the box opposing the motion towards the left.
3. Normal force (Fn) by the floor on the box perpendicular to the surface.
To determine the resultant force, we add the forces acting on the same line of action (towards the right and left).
Fa - Ff = Resultant force
Since Fa is greater than Ff, the resultant force is towards the right. Therefore, the box will accelerate towards the right direction as the net force is unbalanced to the right.
Physics Chapter 10 section 1 Work, Energy, and PowerIbrahim Mutawea
ย
Work is done when a force causes an object to move through a displacement. Work can change the energy of a system based on the work-energy theorem, which states that work done on a system equals the change in its energy. Power is the rate at which work is done or energy is transferred, measured in watts. It is calculated by dividing work by time or by multiplying force, velocity, and the cosine of the angle between them.
The document describes key concepts in physics including energy, force, motion, waves, electricity, and magnetism. Some key points covered include:
- Identifying energy transformations and transfers of heat energy through conduction, convection, and radiation.
- Describing and calculating concepts like velocity, acceleration, Newton's laws of motion, and mechanical advantage of simple machines.
- Investigating light and sound phenomena, static electricity, and the relationship between voltage, current and resistance in electric circuits.
- Relating electricity and magnetism and their common applications.
The document discusses concepts related to equilibrium in physics including:
- Equilibrium as a condition where net forces are balanced out
- Statics as the study of structures in equilibrium under static forces
- Conditions for translational and rotational equilibrium as the sum of forces and sum of torques being equal to zero respectively
- Examples of calculating tensions in ropes and finding the center of gravity to solve equilibrium problems
The document discusses undamped free vibration in machinery. It defines undamped free vibration as vibration of a system with no external damping forces after an initial displacement. It describes methods to determine the natural frequency of vibrating systems including the equilibrium method, energy method, and Rayleigh's method. The equilibrium method uses D'Alembert's principle. The energy method equates kinetic and potential energy. Rayleigh's method equates maximum kinetic and potential energy. Examples of undamped free transverse and torsional vibration are also presented and the equations for their natural frequencies are derived.
Force is any interaction that, when unopposed, will change the motion of an object. There are two types of forces: contact forces that require direct physical contact between objects, and non-contact forces that act over a distance without direct contact. Gravity is the non-contact force that attracts any two masses. The document goes on to define weight as a force and explain the relationship between mass and weight. It also introduces Hooke's law, Newton's laws of motion, and the law of universal gravitation.
The document discusses Isaac Newton's three laws of motion. Newton's first law states that an object at rest stays at rest and an object in motion stays in motion unless acted upon by an unbalanced force. Newton's second law relates that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. Newton's third law states that for every action there is an equal and opposite reaction.
This presentation was provided by Racquel Jemison, Ph.D., Christina MacLaughlin, Ph.D., and Paulomi Majumder. Ph.D., all of the American Chemical Society, for the second session of NISO's 2024 Training Series "DEIA in the Scholarly Landscape." Session Two: 'Expanding Pathways to Publishing Careers,' was held June 13, 2024.
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.
The document discusses key concepts in mechanics including:
1. Free body diagrams show only the external forces acting on an object and are useful for solving dynamics problems.
2. Newton's Second Law states that acceleration is proportional to net force and inversely proportional to mass.
3. Impulse is the product of force and time and equals change in momentum, affecting how objects move after collisions or other impacts.
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.
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
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.
1) Three boxes with masses m1 = 45 kg, m2 = 22 kg, and m3 = 33 kg are resting on a horizontal surface without friction. A horizontal force F of 50 N pushes the boxes to the right.
2) Applying Newton's Second Law to each box yields an acceleration of 0.5 m/s^2 for all boxes.
3) The force exerted by m2 on m3 is 27.5 N, and the force exerted by m1 on m2 is also 27.5 N.
- A force is a push or pull on an object due to its interaction with other objects. Common forces include gravity, normal force, tension, friction, electromagnetic force, and contact force.
- Forces are represented by arrows, with the length proportional to the magnitude. Forces can be added vectorially to find the net/resultant force. If the net force is nonzero, the object will accelerate. If it's zero, the object will maintain a constant velocity or remain at rest.
- For every action there is an equal and opposite reaction. The forces due to interactions between two objects are always equal in magnitude and opposite in direction.
Newton's laws of motion by Mphiriseni Khwandamkhwanda
ย
Newton's Laws of Motion document summarizes Newton's three laws of motion. It discusses Newton's first law, stating that objects at rest stay at rest and objects in motion stay in motion with constant velocity unless acted upon by an unbalanced force. It addresses misconceptions about the first law. Newton's second law states that acceleration is directly proportional to net force and inversely proportional to mass. Problems are provided applying the laws, including drawing free-body diagrams and solving equations of motion. Newton's third law is not discussed.
This document discusses representation in physics, specifically focusing on free-body diagrams. It defines what a free-body diagram is and provides examples of drawing them to represent different forces like weight, tension, and contact forces. Key examples include a person standing, a hanging picture, and boats being towed. The document also discusses the effects of friction, like how it allows cars and feet to move forward, and the factors that influence the amount of friction between surfaces.
With this mantra success is sure to come your way. At APEX INSTITUTE we strive our best to realize the Alchemist's dream of turning 'base metal' into 'gold'.
The forces acting on the box are:
1. Applied force (Fa) by the boy pulling the rope towards the right.
2. Frictional force (Ff) by the floor on the box opposing the motion towards the left.
3. Normal force (Fn) by the floor on the box perpendicular to the surface.
To determine the resultant force, we add the forces acting on the same line of action (towards the right and left).
Fa - Ff = Resultant force
Since Fa is greater than Ff, the resultant force is towards the right. Therefore, the box will accelerate towards the right direction as the net force is unbalanced to the right.
Physics Chapter 10 section 1 Work, Energy, and PowerIbrahim Mutawea
ย
Work is done when a force causes an object to move through a displacement. Work can change the energy of a system based on the work-energy theorem, which states that work done on a system equals the change in its energy. Power is the rate at which work is done or energy is transferred, measured in watts. It is calculated by dividing work by time or by multiplying force, velocity, and the cosine of the angle between them.
The document describes key concepts in physics including energy, force, motion, waves, electricity, and magnetism. Some key points covered include:
- Identifying energy transformations and transfers of heat energy through conduction, convection, and radiation.
- Describing and calculating concepts like velocity, acceleration, Newton's laws of motion, and mechanical advantage of simple machines.
- Investigating light and sound phenomena, static electricity, and the relationship between voltage, current and resistance in electric circuits.
- Relating electricity and magnetism and their common applications.
The document discusses concepts related to equilibrium in physics including:
- Equilibrium as a condition where net forces are balanced out
- Statics as the study of structures in equilibrium under static forces
- Conditions for translational and rotational equilibrium as the sum of forces and sum of torques being equal to zero respectively
- Examples of calculating tensions in ropes and finding the center of gravity to solve equilibrium problems
The document discusses undamped free vibration in machinery. It defines undamped free vibration as vibration of a system with no external damping forces after an initial displacement. It describes methods to determine the natural frequency of vibrating systems including the equilibrium method, energy method, and Rayleigh's method. The equilibrium method uses D'Alembert's principle. The energy method equates kinetic and potential energy. Rayleigh's method equates maximum kinetic and potential energy. Examples of undamped free transverse and torsional vibration are also presented and the equations for their natural frequencies are derived.
Force is any interaction that, when unopposed, will change the motion of an object. There are two types of forces: contact forces that require direct physical contact between objects, and non-contact forces that act over a distance without direct contact. Gravity is the non-contact force that attracts any two masses. The document goes on to define weight as a force and explain the relationship between mass and weight. It also introduces Hooke's law, Newton's laws of motion, and the law of universal gravitation.
The document discusses Isaac Newton's three laws of motion. Newton's first law states that an object at rest stays at rest and an object in motion stays in motion unless acted upon by an unbalanced force. Newton's second law relates that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. Newton's third law states that for every action there is an equal and opposite reaction.
Similar to Drawing Free Body Diagrams for Engineering Statics (20)
This presentation was provided by Racquel Jemison, Ph.D., Christina MacLaughlin, Ph.D., and Paulomi Majumder. Ph.D., all of the American Chemical Society, for the second session of NISO's 2024 Training Series "DEIA in the Scholarly Landscape." Session Two: 'Expanding Pathways to Publishing Careers,' was held June 13, 2024.
Philippine Edukasyong Pantahanan at Pangkabuhayan (EPP) CurriculumMJDuyan
ย
(๐๐๐ ๐๐๐) (๐๐๐ฌ๐ฌ๐จ๐ง ๐)-๐๐ซ๐๐ฅ๐ข๐ฆ๐ฌ
๐๐ข๐ฌ๐๐ฎ๐ฌ๐ฌ ๐ญ๐ก๐ ๐๐๐ ๐๐ฎ๐ซ๐ซ๐ข๐๐ฎ๐ฅ๐ฎ๐ฆ ๐ข๐ง ๐ญ๐ก๐ ๐๐ก๐ข๐ฅ๐ข๐ฉ๐ฉ๐ข๐ง๐๐ฌ:
- Understand the goals and objectives of the Edukasyong Pantahanan at Pangkabuhayan (EPP) curriculum, recognizing its importance in fostering practical life skills and values among students. Students will also be able to identify the key components and subjects covered, such as agriculture, home economics, industrial arts, and information and communication technology.
๐๐ฑ๐ฉ๐ฅ๐๐ข๐ง ๐ญ๐ก๐ ๐๐๐ญ๐ฎ๐ซ๐ ๐๐ง๐ ๐๐๐จ๐ฉ๐ ๐จ๐ ๐๐ง ๐๐ง๐ญ๐ซ๐๐ฉ๐ซ๐๐ง๐๐ฎ๐ซ:
-Define entrepreneurship, distinguishing it from general business activities by emphasizing its focus on innovation, risk-taking, and value creation. Students will describe the characteristics and traits of successful entrepreneurs, including their roles and responsibilities, and discuss the broader economic and social impacts of entrepreneurial activities on both local and global scales.
Andreas Schleicher presents PISA 2022 Volume III - Creative Thinking - 18 Jun...EduSkills OECD
ย
Andreas Schleicher, Director of Education and Skills at the OECD presents at the launch of PISA 2022 Volume III - Creative Minds, Creative Schools on 18 June 2024.
This document provides an overview of wound healing, its functions, stages, mechanisms, factors affecting it, and complications.
A wound is a break in the integrity of the skin or tissues, which may be associated with disruption of the structure and function.
Healing is the bodyโs response to injury in an attempt to restore normal structure and functions.
Healing can occur in two ways: Regeneration and Repair
There are 4 phases of wound healing: hemostasis, inflammation, proliferation, and remodeling. This document also describes the mechanism of wound healing. Factors that affect healing include infection, uncontrolled diabetes, poor nutrition, age, anemia, the presence of foreign bodies, etc.
Complications of wound healing like infection, hyperpigmentation of scar, contractures, and keloid formation.
ISO/IEC 27001, ISO/IEC 42001, and GDPR: Best Practices for Implementation and...PECB
ย
Denis is a dynamic and results-driven Chief Information Officer (CIO) with a distinguished career spanning information systems analysis and technical project management. With a proven track record of spearheading the design and delivery of cutting-edge Information Management solutions, he has consistently elevated business operations, streamlined reporting functions, and maximized process efficiency.
Certified as an ISO/IEC 27001: Information Security Management Systems (ISMS) Lead Implementer, Data Protection Officer, and Cyber Risks Analyst, Denis brings a heightened focus on data security, privacy, and cyber resilience to every endeavor.
His expertise extends across a diverse spectrum of reporting, database, and web development applications, underpinned by an exceptional grasp of data storage and virtualization technologies. His proficiency in application testing, database administration, and data cleansing ensures seamless execution of complex projects.
What sets Denis apart is his comprehensive understanding of Business and Systems Analysis technologies, honed through involvement in all phases of the Software Development Lifecycle (SDLC). From meticulous requirements gathering to precise analysis, innovative design, rigorous development, thorough testing, and successful implementation, he has consistently delivered exceptional results.
Throughout his career, he has taken on multifaceted roles, from leading technical project management teams to owning solutions that drive operational excellence. His conscientious and proactive approach is unwavering, whether he is working independently or collaboratively within a team. His ability to connect with colleagues on a personal level underscores his commitment to fostering a harmonious and productive workplace environment.
Date: May 29, 2024
Tags: Information Security, ISO/IEC 27001, ISO/IEC 42001, Artificial Intelligence, GDPR
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Gender and Mental Health - Counselling and Family Therapy Applications and In...PsychoTech Services
ย
A proprietary approach developed by bringing together the best of learning theories from Psychology, design principles from the world of visualization, and pedagogical methods from over a decade of training experience, that enables you to: Learn better, faster!
2. NET FORCE
When the net force on an
object is zero, the
ACCELERATION of the object is
zero, However, the object may
still be moving IN A STRAIGHT
LINE
4. FUNDAMENTAL
FORCES
How many forces are involved
in a free body diagram?
1 Gravity
2 Electromagnetic
3 Strong Nuclear Force
4 Weak Nuclear Force
5. FUNDAMENTAL
FORCES
How many forces are involved
in a free body diagram?
1 Gravity
2 Electromagnetic
3 Strong Nuclear Force
4 Weak Nuclear Force
The strong and weak nuclear forces have very short
ranges and are only effective inside the nucleus.
Therefore, you only have TWO fundamental forces to
consider! Easy, right??
6. FUNDAMENTAL
FORCES
How many forces are involved
in a free body diagram?
1 Gravity
๐น = ๐บ
๐1๐2
๐2
In most cases, one of the two masses is the
earth (d is the radius of the earth, and Gm1/d2
is โlittle gโ or approximately 9.8 m/s2).
Even placing an object at the top of a tall
skyscraper has little effect on gravity. The
acceleration due to gravity is usually a known
quantity given in the problem.
2 Electromagnetic
7. FUNDAMENTAL
FORCES
How many forces are involved
in a free body diagram?
1 Gravity
๐น = ๐บ
๐1๐2
๐2
2 Electromagnetic
Coulomb force
Magnetic force
Friction
Tension
Bouyant
Normal
Spring
Intermolecular
12. WHY IS THIS SO
HARD?
1.Resolve all force
vectors into their x y
and z components
2. ฮฃ๐น๐๐๐ก = 0 ๐
3.Draw each pair of
forces involved ONE
PAIR AT A TIME
Letโs make it simpler
13. Gravity
(assume the ropes have negligible weight. Then
the force of gravity on them is zero. You may
exclude these two pairs of forces)
Intuitively, we might assume that the
force through each rope is 50N. But we
can also prove it mathematically.
๐1 = ๐2
๐1 + ๐2 = 100๐
A simple substitution gives us the
answer.
๐1 + ๐1 = 100๐
๐1 = ๐2 = 50๐
14. Gravity
(assume the ropes have negligible weight. Then the
force of gravity on them is zero. You may exclude
these two pairs of forces)
According to Newtonโs 3rd Law of Gravity,
forces always occur in pairs.
โข What object does the โreaction forceโ
act on?
โข What is the magnitude and direction of
this โreaction forceโ?
15. Gravity
(assume the ropes have negligible weight. Then the force
of gravity on them is zero. You may exclude these two
pairs of forces)
Since we are only
concerned with the
forces acting on the
sign and not the
earth, we can
exclude the earth
and the reaction
force on it.
16. If the only force acting on
the sign were the weight of
the sign, there would be a
NON-ZERO net force acting on
the sign, and it would
accelerate in the direction
of the net force (in this
case, towards the ground)
17. Tension
Fortunately, there are 2
ropes supporting the weight
of the sign.
The SUM of these forces that
are acting on the sign ADD
UP TO ZERO. We know this
because the sign is NOT
ACCELERATING
18. CHECK YOUR WORK
Did we include all
relevant forces?
Suggestion โ always start
with gravity
So far, we have drawn the
diagram. In the next step, we
will calculate the horizontal
and vertical components of the
tension forces in each rope.
20. WHAT DO WE KNOW
๐1=๐2cosฮ
We know this because the acceleration
(and hence the net force) in the
horizontal direction is zero.
Donโt confuse these forces for
action/reaction pairs of forces!
Remember that the โreactionโ forces
are acting on THE SIGN. An easy way
to remember this is to pretend the sign
were made of a stretchy material.
21. WHAT DO WE KNOW
In this problem, it is
ESSENTIAL to solve for
T2 before proceeding to
the horizontal forces.
Once youโve done enough
of these problems,
youโll see that each one
is a puzzle to be
solved.
๐1=๐2cosฮ