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Karen Adelan presented on the topic of classical mechanics and energy. Some key points: - Energy is a conserved quantity that can change forms but is never created or destroyed. It is useful for describing motion when Newton's laws are difficult to apply. - Kinetic energy is the energy of motion and depends on an object's mass and speed. The work-kinetic energy theorem states that the net work done on an object equals the change in its kinetic energy. - Potential energy is the energy an object possesses due to its position or state. The work done by a constant force equals the product of force, displacement, and the cosine of the angle between them.

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Torque

This presentation gives the basic idea of torque to the beginners, helps to understand the torque in everyday life

Work, power and energy

The document summarizes key concepts relating to work, power, efficiency, and energy flow. It defines work as the transfer of energy through motion requiring a force over a distance. Power is the rate at which work is done or energy is used. Efficiency refers to the ratio of useful energy output to the total energy input. Energy flow diagrams can be used to trace the storage, conversion, transmission and output of energy through a system, identifying losses at each step.

Center of mass

The document defines and explains the center of mass of an object or system. It is the point where the entire mass can be thought to be concentrated and acts as the balancing point. The center of mass will lie along the central axis of symmetry and follows a parabola for projectile motion. Its position can be calculated using equations that account for the individual masses and positions of all particles in the system. The center of mass moves with zero acceleration when the net external force on the system is zero.

Work, energy and power

1) In an elastic collision between two bodies in one dimension, both linear momentum and kinetic energy are conserved.
2) By applying the laws of conservation of momentum and kinetic energy, equations relating the velocities of the bodies before and after collision can be derived.
3) These equations allow calculating the unknown velocities if the masses of the bodies and their velocities before collision are known.

Dynamics

The document discusses mechanics and dynamics. It begins by defining mechanics as a branch of physics dealing with the behavior of physical bodies under forces or displacements. Dynamics is identified as the branch of mechanics concerned with the effects of forces on motion, especially external forces. The document goes on to provide information on internal forces, types of fundamental forces, Newton's laws of motion, and concepts such as inertia, mass, and equilibrium. It includes examples of applying dynamics concepts to problems involving forces.

Work, energy and power

The document discusses concepts related to mechanical energy, including work, kinetic energy, potential energy, and power. It defines energy as the capacity to do work and describes several forms of energy. Work is defined as the dot product of force and displacement. Kinetic energy is defined as 1/2mv^2 and depends on an object's motion. Potential energy exists in gravitational and elastic forms and depends on an object's position or state. The conservation of mechanical energy and work-energy theorem are explained. Power is defined as the rate of energy transfer.

Physics Equilibrium

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

Moment of force

There are six simple machines: lever, pulley, wheel and axle, inclined plane, screw, and wedge. They allow a smaller force to overcome a larger force or move a load a greater distance. The actual mechanical advantage of a machine is the ratio of the output force to the input force. The ideal mechanical advantage is the ratio of the input distance to the output distance. Due to friction and other losses, the efficiency of a machine is the ratio of its output work to its input work and is always less than 100%. Simple machines allow work to be done more easily by changing either the size, direction, or point of application of a force.

Centripetal Force

Explains centripetal and centrifugal force and acceleration.
**More good stuff available at:
www.wsautter.com

Rotational motion

1. The document defines key terms related to rotational motion such as angular position, angular displacement, angular velocity, and angular acceleration.
2. It also outlines the four fundamental equations of angular motion and how they are analogous to the linear equations of motion.
3. Key concepts such as moment of inertia, torque, angular momentum, and their relationships to linear motion are summarized.

13 angular momentum

The document discusses angular momentum in three sections:
1) It defines angular momentum and how it is analogous to linear momentum, relating angular momentum to torque and moment of inertia.
2) It explains that angular momentum is conserved when there is no external torque, and provides examples of how objects can change their moment of inertia and angular velocity while conserving angular momentum.
3) It states that angular momentum is a vector quantity pointing in the direction of the angular velocity, and provides examples of balancing angular momentum.

types of friction

here in this presentation i explain the types of friction and their examples. and i explain world without friction is like this in video.

MOMENTUM, IMPULSE AND COLLISION

This powerpoint presentation covers the concepts of momentum, impulse and collision between to or more bodies in one and two dimensional motion.

Moments

This document discusses moments and their applications. It defines moment as the product of a force and the perpendicular distance to the point of rotation. There are clockwise and anticlockwise moments. Varignon's principle of moments states the algebraic sum of moments about any point equals the moment of the resultant force. Levers are machines that use moments to multiply force. There are three types of simple levers and examples of levers include scissors and pliers. Compound levers use multiple simple levers together. Moments allow machines like levers to provide mechanical advantage.

Projectile motion of a particle

This PPT covers projectile motion of an object in a very systematic and lucid manner. I hope this PPT will be helpful for instructors as well as students.

2.3 work energy and power

The document discusses various concepts in mechanics including work, energy, power, and collisions. It defines work as the product of the applied force and displacement in the direction of force. It provides examples of calculating work done by pushing/lifting objects and moving in a current. Kinetic energy is defined as 1/2mv^2 and gravitational potential energy as mgh. The principle of conservation of energy states that total energy in a closed system remains constant as it can only be transferred or transformed. Power is defined as the rate of doing work and is measured in Watts. Collisions conserve momentum and kinetic energy may or may not be conserved depending on whether the collision is elastic or inelastic.

Chapter 07 impulse and momentum

1) Momentum is defined as the product of an object's mass and velocity. Impulse is the change in momentum caused by a force acting over a time interval.
2) Conservation of momentum states that the total momentum of an isolated system remains constant. During collisions or explosions, the total initial momentum equals the total final momentum.
3) Impulse and momentum are directly related through the equation: Impulse = Change in Momentum. A force acting over a time interval will change an object's momentum by an amount equal to the impulse.

Moment of inertia

Moment of inertia (I) is a property of an object that represents its resistance to angular acceleration about an axis. I depends on both the mass of the object and how far its mass is distributed from the axis of rotation. Mathematically, I is defined as the sum of the mass of each particle multiplied by the square of its distance from the axis. An object has three principal axes with maximum, minimum, and intermediate moments of inertia. Composite areas have moments of inertia that can be calculated by subtracting or adding the I values of individual shapes about an axis.

Conservation of linear momentum

The document discusses the principle of conservation of momentum. It defines conservation of momentum as the total momentum before collision or explosion being equal to the total momentum after. It provides examples of collisions where objects move separately or together after impact, as well as explosions where objects are in contact before but separate after. It then gives sample problems calculating momentum and velocity in situations involving colliding cars and trolleys.

Scalar and vector quantities

This document discusses physical quantities and vectors. It defines two types of physical quantities: scalar quantities which have only magnitude, and vector quantities which have both magnitude and direction. Examples of each are given. Vector quantities are represented by magnitude and direction. The document then discusses methods for adding and subtracting vectors graphically using head-to-tail and parallelogram methods. It also covers resolving vectors into rectangular components, finding the magnitude and direction of vectors, dot products of vectors which yield scalar quantities, and cross products of vectors which yield vector quantities. Examples of applying these vector concepts are provided.

Torque

Torque

Work, power and energy

Work, power and energy

Center of mass

Center of mass

Work, energy and power

Work, energy and power

Dynamics

Dynamics

Work, energy and power

Work, energy and power

Physics Equilibrium

Physics Equilibrium

Moment of force

Moment of force

Centripetal Force

Centripetal Force

Rotational motion

Rotational motion

13 angular momentum

13 angular momentum

types of friction

types of friction

MOMENTUM, IMPULSE AND COLLISION

MOMENTUM, IMPULSE AND COLLISION

Moments

Moments

Projectile motion of a particle

Projectile motion of a particle

2.3 work energy and power

2.3 work energy and power

Chapter 07 impulse and momentum

Chapter 07 impulse and momentum

Moment of inertia

Moment of inertia

Conservation of linear momentum

Conservation of linear momentum

Scalar and vector quantities

Scalar and vector quantities

Work and Energy

I do not have enough information to fully answer the questions. The passage provides the kinetic energy and heights of points A and B, but does not give the mass of the block, which is needed to calculate kinetic energy at B using the work-energy theorem. It also does not provide the distance or time of travel between B and C, which would be needed to calculate the work done by friction during the BC segment.

10 work and energy

The document discusses various topics relating to work, energy, and power in physics. It defines work, kinetic energy, gravitational potential energy, and conservation of energy. It provides examples of calculating work, kinetic energy, changes in potential energy, and applying the work-energy principle and conservation of energy to problems involving objects moving under gravitational and other forces. It also defines power and provides examples of calculating power required to climb stairs, accelerate a car, and overcome forces like friction and air resistance.

03 part1 general conservation of energy and mass principles for control volume

This document discusses general principles of conservation of mass and energy for control volumes. It defines key terms like control volume, steady state, mass flow rate, and volume flow rate. The main points covered are:
1) Conservation of mass states that the mass flow rate entering a control volume must equal the mass flow rate leaving. This is known as the equation of continuity.
2) Conservation of energy for a control volume accounts for changes in internal energy, as well as work and heat transfer associated with mass flowing into and out of the control volume.
3) A steady flow process is one where properties inside the control volume and at its boundaries remain constant over time, although properties may change within the control volume.

Momentum & Collisions

This document provides an overview of momentum and collisions in physics. It defines momentum as the product of an object's mass and velocity, and explains how momentum can be changed through the application of an impulse, which is the product of force and time. The document also discusses conservation of momentum, stating that the total momentum of a system is always conserved during collisions or interactions. Several examples of collision calculations are worked through, including explosions, "hit and stick" collisions, and "hit and rebound" collisions.

Forms of energy

The document discusses different types of energy:
- Kinetic energy is the energy of motion and examples include moving water, wind, and electricity conducted by moving electrons.
- Potential energy is stored energy, with examples being oil in a barrel or water in a lake above ground. It has the potential to do work if released.
- Energy can change forms, like the kinetic and potential energy exchanged on a roller coaster ride.
- Other types include mechanical, heat, chemical, electrical, gravitational, and more. Mechanical energy powers motion while heat energy comes from applying heat. Chemical and electrical energies result from chemical reactions and electricity.

Bernoulli’s principle

definition of Bernoulli's Principle.
The evidence of Bernoulli's Principle in our daily life.
Application of Bernoulli's Principle

Bernoulli theorm

This document describes an experiment to verify Bernoulli's theorem. Bernoulli's theorem states that for an inviscid, incompressible fluid flowing steadily through a closed passage, the total energy at any point remains constant. The experiment involves measuring the pressure, velocity, and elevation at different points in a diverging duct carrying water. Observations are recorded and used to plot the total energy line, which should be horizontal according to Bernoulli's theorem. The results support the theorem by showing the total energy remains constant despite changes in pressure, velocity, and elevation along the duct.

Bernoulli and continuity equation

This document discusses Bernoulli's principle and equation in fluid mechanics. It provides definitions and explanations of key terms like Bernoulli's principle, conservation of energy principle, and various forms of Bernoulli's equation. It also includes proofs of Bernoulli's theorem derived from conservation of energy and Newton's second law. Finally, it discusses the continuity equation and theorem in fluid mechanics.

Bernoulli's Principle

The document discusses key concepts in fluid dynamics including:
1) Bernoulli's principle states that an increase in fluid velocity results in a decrease in pressure.
2) Pascal's law describes how pressure is transmitted equally in all directions throughout a confined fluid.
3) Continuity equations states that the flow rate of a fluid remains constant regardless of changes to its velocity or pressure.
4) Venturi tubes use the Bernoulli effect to create areas of lower pressure by increasing fluid velocity through constrictions.

Bernoulli’s equation

1. The document discusses ideal fluids and their properties, including being incompressible and nonviscous.
2. It introduces concepts like laminar and turbulent flow, and uses Bernoulli's principle and the continuity equation to relate fluid properties like pressure, velocity, and flow rate.
3. Examples are given to demonstrate how Bernoulli's principle can be used to understand phenomena like decreases in pressure associated with increases in flow speed.

Bernoulli's Principle

Bernoulli's principle states that an increase in the speed of a fluid occurs simultaneously with a decrease in pressure. The principle was introduced by Daniel Bernoulli in 1738 and describes the behavior of incompressible, non-viscous fluids. It explains various phenomena like aircraft lift, spoiler function, tennis ball motion, and carburetor/venturi tube operation. The document covers the theory, equation, and various applications of Bernoulli's principle.

Applications of bernoulli equation

Bernoulli's equation states that the total mechanical energy of an incompressible and inviscid fluid is constant. It has applications in sizing pumps, flow sensors, ejectors, carburetors, siphons, and pitot tubes. In pumps, the volute converts kinetic energy to pressure energy. Ejectors use pressure energy to create velocity energy to entrain suction fluid and then convert it back to pressure. Pitot tubes use pressure differences to measure flow velocity. Carburetors use Bernoulli's principle to draw in fuel, where faster air has lower pressure. Siphons use the principle to move liquid over an obstruction without pumping.

Bernoulli’s Theorem

This document summarizes Daniel Bernoulli and his theorem on fluid mechanics. It discusses how Bernoulli, a Swiss scientist born in the 1700s, discovered that an increase in the speed of a moving fluid is accompanied by a decrease in the fluid's pressure. Bernoulli's principle, also called Bernoulli's theorem, states that the total energy in a fluid remains constant provided the flow is steady, frictionless, and incompressible. The document then provides Bernoulli's equation and describes experiments using a Venturi meter to verify the theorem by measuring pressure and velocity changes at different pipe sections. It concludes that the experiments validate Bernoulli's equation and its applications in fluid mechanics and aerodynamics.

Appeal to All People: Help Stop Climate Change

One of the serious environmental issues we are facing to day is climate change. What causes this? How do we help stop it? This presentation answers these questions.
More themed slides: https://slideshop.com/Themed-Slides/

Chapter 6 Work And Energy

Work is done when a force causes an object to be displaced. Work (W) is equal to force (F) multiplied by displacement (s). Work units are joules. Potential energy is stored energy due to an object's position or state. Kinetic energy is the energy of motion and depends on an object's mass and velocity. Power is the rate at which work is done or energy is converted and is measured in watts. Conservation of energy states that energy cannot be created or destroyed, only changed from one form to another.

Types of Energy

The document defines and describes six main forms of energy: mechanical energy, electrical energy, light energy, thermal energy, sound energy, and mechanical energy. Mechanical energy is the energy of movement, including both kinetic and potential energy. Electrical energy is produced when electrons move from one place to another. Light energy travels in waves through empty space. Thermal energy is the energy of moving particles in a substance, also known as heat energy. Sound energy is produced by vibrating objects. The document then asks 20 questions about observing different types of energy.

Ppt Conservation Of Energy

The document discusses the law of conservation of energy and examples of energy transforming from one form to another. It provides examples of potential energy transforming into kinetic energy when an apple falls from a tree and when a person swings on a swing. It also explains that when the swing slows down, friction causes the mechanical energy to be transferred to thermal energy in the form of heat. The document emphasizes that energy is neither created nor destroyed, but rather transformed between different forms, and the total energy in a system remains constant according to the law of conservation of energy.

Energy

A presentation on types of Energy meant for school going children between standard 3 to 5 (Class or Grade 3 to 5)

Lecture 5 castigliono's theorem

This document discusses Castigliano's theorems for analyzing stresses and strains in structures. It explains that Castigliano's first theorem states that the partial derivative of a structure's strain energy with respect to an applied force equals the displacement at the point of application of that force. Castigliano's second theorem states that the partial derivative of strain energy with respect to a displacement equals the force that produces that displacement. The document provides mathematical expressions to calculate strain energy and uses these theorems to analyze beam deflections under applied loads.

Lecture 4 3 d stress tensor and equilibrium equations

* Shear stress, τ = 50 N/mm2
* Shear modulus, C = 8x104 N/mm2
* Strain energy per unit volume = τ2/2C
= (50)2 / 2(8x104)
= 0.3125 J/mm3
Therefore, the local strain energy per unit volume stored in the material due to shear stress is 0.3125 J/mm3.

Work and Energy

Work and Energy

10 work and energy

10 work and energy

03 part1 general conservation of energy and mass principles for control volume

03 part1 general conservation of energy and mass principles for control volume

Momentum & Collisions

Momentum & Collisions

Forms of energy

Forms of energy

Bernoulli’s principle

Bernoulli’s principle

Bernoulli theorm

Bernoulli theorm

Bernoulli and continuity equation

Bernoulli and continuity equation

Bernoulli's Principle

Bernoulli's Principle

Bernoulli’s equation

Bernoulli’s equation

Bernoulli's Principle

Bernoulli's Principle

Applications of bernoulli equation

Applications of bernoulli equation

Bernoulli’s Theorem

Bernoulli’s Theorem

Appeal to All People: Help Stop Climate Change

Appeal to All People: Help Stop Climate Change

Chapter 6 Work And Energy

Chapter 6 Work And Energy

Types of Energy

Types of Energy

Ppt Conservation Of Energy

Ppt Conservation Of Energy

Energy

Energy

Lecture 5 castigliono's theorem

Lecture 5 castigliono's theorem

Lecture 4 3 d stress tensor and equilibrium equations

Lecture 4 3 d stress tensor and equilibrium equations

Every Equation

The document discusses key physics concepts related to motion, forces, energy, and electricity. It defines terms like speed, velocity, acceleration, force, work, power, kinetic energy, potential energy, current, voltage, and resistance. Formulas are provided for calculating these values along with example problems and explanations of physics principles.

Chapter 4 Work energy power.pptx

This document discusses work, energy, and power in physics. It defines work as the scalar product of force and displacement along the direction of force. Work is a transfer of energy and can be positive, negative, or zero. The work-energy theorem states that work done on an object changes its kinetic energy. Potential energy includes gravitational potential energy, which depends on an object's height above ground. Elastic potential energy is stored in compressed or stretched springs. Energy is always conserved and can change forms between kinetic and potential. Power is the rate at which work is done or energy is transferred.

Work and energy part a

The document discusses work, energy, and the work-energy principle as an alternative way to analyze motion compared to using forces and Newton's laws. It defines key terms like work, kinetic energy, and systems. The work-energy principle states that the net work done on an object equals its change in kinetic energy (Wnet = ΔKE). This allows reexpressing Newton's second law in terms of energy rather than forces. Examples show how to calculate work, kinetic energy, and use the work-energy principle to solve motion problems.

Kinetic theory

Work, energy, and power are defined. Work is force times distance. Kinetic energy is equal to one-half mass times velocity squared. Power is the rate of doing work, defined as work per unit time. Several examples of calculating work are provided for different scenarios like lifting an object, lowering an object, and work done by springs. The concept that work is based on the force component in the direction of motion is emphasized.

Chapter7 1 4-fa05

Work, energy, and power are defined. Work is force times distance. Kinetic energy is equal to one-half mass times velocity squared. Power is the rate of doing work, defined as work per unit time. Several examples of calculating work are provided for different scenarios like lifting an object, springs, and overcoming friction. The key concepts of work, kinetic energy, and power are reviewed.

dyn-part3.ppt

CHAPTER 18
PLANAR KINETICS OF A RIGID BODY: WORK AND ENERGY (Sections 18.1-18.4)
Objectives:
a) Define the various ways a force and couple do work.
b) Apply the principle of work and energy to a rigid body.
APPLICATIONS
The work of the torque developed by the driving gears on the two motors on the mixer is transformed into the rotational kinetic energy of the mixing drum.
The work done by the compactor's engine is transformed into the translational kinetic energy of the frame and the translational and rotational kinetic energy of
its roller and wheels
2. Rotation: When a rigid body is rotating about a fixed axis passing through point O, the body has both translational and rotational kinetic energy:
T = 0.5m(vG)2 + 0.5IGw2
Since
vG = rGw, T = 0.5(IG + m(rG)2)w2 = 0.5IOw2

Do Work!

This document provides an overview of key concepts related to work, energy, and power including:
- The definitions and relationships between work, kinetic energy, gravitational potential energy, and elastic potential energy.
- Conservative and non-conservative forces.
- How to calculate work done by non-conservative forces.
- The work-energy theorem and the law of conservation of energy.
- The definition of power as the rate of doing work.

Third ppt

The document discusses concepts related to work, energy and power in physics. It defines work as the product of force and displacement. Kinetic energy is defined as the energy an object possesses due to its motion. The law of conservation of energy states that energy cannot be created or destroyed, only transferred or changed from one form to another. Thermal energy is the energy contained within a system that is responsible for its temperature and is produced from friction. Power is defined as the rate of doing work or using energy and is measured in watts. Several examples of calculations related to work, energy and power are also presented.

5299254.ppt

1. Work done by a constant force depends on the magnitude of the force and the displacement along the direction of the force. Work done by opposing forces is negative. Centripetal forces do no work as they are always perpendicular to motion.
2. The work-kinetic energy theorem states that the work done on an object equals its change in kinetic energy. It can be used to calculate changes in speed.
3. Gravitational potential energy is defined as mgh. The principle of conservation of mechanical energy can be used to solve problems involving changes in kinetic and potential energy in an isolated system, such as an object moving under gravity.

Lecture09

1. The lecture covered work, kinetic energy, and energy conservation.
2. Work is the transfer of energy via a force. It can be positive, negative, or zero depending on the angle between the force and displacement.
3. Kinetic energy is defined as 1/2 mv^2 and represents the energy of motion. The work done on an object causes a change in its kinetic energy.

Lecture09

1. The lecture covered work, kinetic energy, and energy conservation.
2. Work is the transfer of energy using a force. Work can be positive, negative, or zero depending on the angle between the force and displacement.
3. Kinetic energy is related to an object's motion and is calculated as K = 1/2 mv^2. Work done on an object changes its kinetic energy such that the total work is equal to the change in kinetic energy.

2 work energy power to properties of liquids

1) Work is done when a force causes an object to be displaced. It is defined as the product of the force and displacement in the direction of the force. Work is a scalar quantity measured in joules.
2) Energy is the ability to do work and exists in kinetic and potential forms. Kinetic energy is the energy of motion and potential energy is stored energy due to an object's position or state.
3) According to the work-energy theorem, the work done on an object equals its change in kinetic energy. For a variable force, the work is calculated as the area under the force-displacement graph.

2 work energy power to properties of liquids

Work is done when a force causes an object to be displaced. Work is defined as the product of the force and displacement in the direction of the force. Kinetic energy is the energy an object possesses due to its motion. Potential energy is the energy an object possesses due to its position or state. The law of conservation of energy states that energy cannot be created or destroyed, only changed from one form to another. Elastic collisions are collisions where both momentum and kinetic energy are conserved, while inelastic collisions conserve momentum but not kinetic energy.

Work-energy-and-power PHYSICS SCIENCE BSIT

This document discusses work, energy, and power. It defines work as a force causing an object to be displaced. The work-energy theorem states that work done on an object changes its kinetic energy. Potential energy is the energy an object has due to its position or state. There are different types of potential energy including gravitational potential energy and elastic potential energy. Power is defined as the rate at which work is done or energy is transferred. It can be calculated by dividing work by time.

Chapter 6 work & energy

1. The document discusses work, energy, and their relationship as described by the work-energy theorem. It defines work as a force applied over a displacement, and gives the equation W=Fd.
2. Kinetic energy is defined as K=1/2mv^2. The work-energy theorem states that the work done on an object is equal to the change in its kinetic energy, or W=ΔK.
3. Potential energy, such as gravitational potential energy mgh, is discussed. The work done by gravity in lifting an object does not depend on the path, only the change in height.

Work power-energy

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'.

Chapter 5 notes

This document outlines objectives and concepts related to work, power, and energy. It defines work as the product of force and displacement when they are in the same direction. It introduces kinetic energy and potential energy, and discusses how the conservation of mechanical energy applies to situations where energy is transferred between kinetic and potential forms. Power is defined as the rate at which work is done. Examples are provided to demonstrate calculations of work, kinetic energy, potential energy, and power.

Ap review total

This document covers concepts in one-dimensional and three-dimensional kinematics, dynamics, work, energy, momentum, rotational motion, and more. Examples are provided to demonstrate how to apply equations for instantaneous and average velocity/acceleration, projectile motion, Newton's laws, work-energy theorem, impulse-momentum, center of mass, moment of inertia, and torque. Problem-solving strategies are outlined for analyzing forces, energy, momentum, and rotational equilibrium.

Work power energy

1) This document discusses work, power, and energy. It defines work as the product of force and displacement, and defines the units of work as newton-meters (Nm) or joules (J).
2) Power is defined as the rate of doing work, or the ratio of work to time. The units of power are watts (W).
3) Energy exists in various forms including mechanical, thermal, chemical, light, sound, nuclear, and electrical. Mechanical energy includes potential energy, which depends on position or height, and kinetic energy, which depends on motion or velocity.
4) The work-energy principle states that the work done on an object equals its change in

Chapter 6

This document discusses work, energy, and power. It defines work as the product of parallel force and distance. Kinetic energy and gravitational potential energy are forms of mechanical energy. The work-kinetic energy theorem states that work done by net force equals change in kinetic energy. The law of conservation of energy says energy cannot be created or destroyed, only converted from one form to another. Power is defined as work done per unit time. Examples calculate work, kinetic energy, potential energy, efficiency, and power for various situations.

Every Equation

Every Equation

Chapter 4 Work energy power.pptx

Chapter 4 Work energy power.pptx

Work and energy part a

Work and energy part a

Kinetic theory

Kinetic theory

Chapter7 1 4-fa05

Chapter7 1 4-fa05

dyn-part3.ppt

dyn-part3.ppt

Do Work!

Do Work!

Third ppt

Third ppt

5299254.ppt

5299254.ppt

Lecture09

Lecture09

Lecture09

Lecture09

2 work energy power to properties of liquids

2 work energy power to properties of liquids

2 work energy power to properties of liquids

2 work energy power to properties of liquids

Work-energy-and-power PHYSICS SCIENCE BSIT

Work-energy-and-power PHYSICS SCIENCE BSIT

Chapter 6 work & energy

Chapter 6 work & energy

Work power-energy

Work power-energy

Chapter 5 notes

Chapter 5 notes

Ap review total

Ap review total

Work power energy

Work power energy

Chapter 6

Chapter 6

Conservation of energy

This document discusses the conservation of energy. It explains that energy cannot be created or destroyed, but rather is transferred from one form to another. Some key points made include:
- Energy exists in various forms including kinetic, potential, chemical, thermal, and mechanical.
- Mechanical energy is the sum of kinetic and potential energy in a system. It remains constant as energy transforms between these two forms, for example as an object gains kinetic energy while losing gravitational potential energy.
- The law of conservation of energy states that the total energy in an isolated system is constant. Energy transforms between forms through processes like friction, but the overall quantity remains the same.

Radiation ppt

Radiation and radioactive waste can have biological effects on animals, plants, and humans. Radioactive waste is material contaminated by radio nuclides, which are unstable atoms that decay and emit radiation. Exposure to ionizing radiation depends on the type and amount of radiation, dose received, and exposure conditions. While low doses may cause no immediate harm, high doses can cause radiation sickness, cancer, and genetic effects in the short and long term. Radiation can damage plants' growth, development, and genetic makeup. In humans, high radiation exposure can cause initial symptoms like nausea and vomiting and higher doses may cause hair loss, organ damage, and death in some cases. Long term effects include increased risk of cancers and diseases. Proper

Newton’s first law of motion

Newton's First Law of Motion 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. It also describes inertia as an object's resistance to changes in its motion. 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. Newton's Third Law states that for every action, there is an equal and opposite reaction.

Heat transfer: thermodynamics

This document discusses different methods of heat transfer: conduction, convection, and radiation.
Conduction involves the direct transfer of heat between objects in contact. Good conductors like metals allow rapid heat transfer while insulators like wood and plastic impede it. Convection refers to heat transfer through fluid motion, like hot air rising. Radiation transfers heat through electromagnetic waves and does not require a medium, like the sun warming the Earth. Experiments are described to show how different materials conduct heat at different rates. The key methods of heat transfer are defined and examples are given of heat transferring through various natural processes and everyday situations.

properties of light

The document discusses several key properties of light:
1) Interference and polarization of light are examined through experiments like Young's slits and using polarizers. Interference creates light and dark fringes depending on the path difference between waves.
2) Huygens' principle is introduced as explaining how secondary wavelets propagate light in a manner consistent with laws of reflection and refraction. Each point on a wavefront acts as a secondary source.
3) Polarization occurs when unpolarized light passes through a filter, causing vibrations of the electric field to lie in one plane rather than randomly oriented planes. Crossed polarizers can eliminate transmitted light.

pinhole camera product oriented assessment - rubric

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Description:
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Feedback and Contact Information:
Your feedback is valuable! For any queries or suggestions, please contact muruganjit@agacollege.in

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- 1. Presented by: Karen A. Adelan BSE 3 Classical Mechanics
- 2. Why Energy? Why do we need a concept of energy? The energy approach to describing motion is particularly useful when Newton’s Laws are difficult or impossible to use Energy is a scalar quantity. It does not have a direction associated with it
- 3. What is Energy? Energy is a property of the state of a system, not a property of individual objects: we have to broaden our view. Some forms of energy: Mechanical: Kinetic energy (associated with motion, within system) Potential energy (associated with position, within system) Chemical Electromagnetic Nuclear Energy is conserved. It can be transferred from one object to another or change in form, but cannot be created or destroyed
- 4. Kinetic Energy Kinetic Energy is energy associated with the state of motion of an object For an object moving with a speed of v KE 1 2 mv 2 SI unit: joule (J) 1 joule = 1 J = 1 kg m2/s2
- 6. Work W 1 2 1 2 Fx x Start with 2 mv 2 mv0 Work “W” Work provides a link between force and energy Work done on an object is transferred to/from it If W > 0, energy added: “transferred to the object” If W < 0, energy taken away: “transferred from the object”
- 7. Work Unit This gives no information about the time it took for the displacement to occur the velocity or acceleration of the object Work is a scalar quantity 1 2 1 2 SI Unit mv mv0 ( F cos 2 2 Newton • meter = Joule N • m = J J = kg • m2 / s2 = ( kg • m / s2 ) • m W ( F cos ) x ) x
- 8. Work: + or -? Work can be positive, negative, or zero. The sign of the work depends on the direction of the force relative to the displacement W ( F cos ) x Work positive: W > 0 if 90°> > 0° Work negative: W < 0 if 180°> > 90° Work zero: W = 0 if = 90° Work maximum if = 0° Work minimum if = 180°
- 9. Example: When Work is Zero A man carries a bucket of water horizontally at constant velocity. The force does no work on the bucket Displacement is horizontal Force is vertical cos 90° = 0 W ( F cos ) x
- 10. Example: Work Can Be Positive or Negative Work is positive when lifting the box Work would be negative if lowering the box The force would still be upward, but the displacement would be downward
- 11. F Work Done by a Constant Force The work W done on a system by an agent exerting a constant force on the system is the product of the magnitude F of the force, the magnitude Δr of the displacement of the point of application of the force, and cosθ, where θ is the angle between the force and displacement vectors: W F r F r r II I 0F WI WII F r F r r F r cos III WIII F r IV WIV F r cos February 11, 2014
- 12. Work Done by Multiple Forces If more than one force acts on an object, then the total work is equal to the algebraic sum of the work done by the individual forces Wnetnet W Wby by individual forces Windividual forces Remember work is a scalar, so this is the algebraic sum Wnet Wg WN WF Wnet Wg WN WF ( F cos ) r ( F cos ) r February 11, 2014
- 13. Work and Multiple Forces Suppose µk = 0.200, How much work done on the sled by friction, and the net work if θ = 30° and he pulls the sled 5.0 m ? ( f k cos180 ) x W fric k N x k fk x (mg F sin ) x (0.200)(50.0kg 9.8m / s 2 1.2 102 N sin 30 )(5.0m) 4.3 102 J Wnet WF W fric WN Wg 5.2 102 J 90.0 J 4.3 102 J 0 0
- 14. Kinetic Energy object is the energy which it possesses due to its motion.[1] It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity. Having gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes. The same amount of work is done by the body in decelerating from its current speed to a state of rest. In classical mechanics, the kinetic energy of a non-rotating object of mass m traveling at a speed v is ½ mv². In relativistic mechanics, this is only a good approximation when v is much less than the speed of light.
- 15. Work-Kinetic Energy Theorem Is the net work done on an object is equal to the change in the kinetic energy of the object. Wnet = ∆KE Net work is equal to kinetic energy
- 16. • Kinetic energy depends on speed and mass: KE = ½mv2 Kinetic energy = ½ x mass x (speed)2 KE is a scalar quantity, SI unit (Joule)
- 17. • TRY TO SOLVE: Ex. A 7.00 kg bowling ball moves at 3.00 m/s. how much kinetic energy does the bowling ball have? how fast must a 2.24 g table-tennis ball move in order to have the same kinetic energy as the bowling ball? Is the speed reasonable for a table-tennis ball? Given: the subscript b and t indicate the bowling ball and the table-tennis ball, respectively. Mb = 7.00 kg Mt = 2.24g Vb = 3.00m/s Unknown: KEb = ? Vt = ?
- 18. Work-Kinetic Energy Theorem When work is done by a net force on an object and the only change in the object is its speed, the work done is equal to the change in the object’s kinetic energy Speed will increase if work is positive Speed will decrease if work is negative Wnet 1 mv 2 2 1 2 mv0 2
- 19. Work-Energy Theorem W= KE W=KEf-KEi “In the case in which work is done on a system and the only change in the system is in its speed, the work done by the net force equals the change in kinetic energy of the system.”
- 20. • The Work-Kinetic Energy Theorem can be applied to non isolated systems • A non isolated system is one that is influenced by its environment (external forces act on the system)
- 21. Work and Kinetic Energy The driver of a 1.00 103 kg car traveling on the interstate at 35.0 m/s slam on his brakes to avoid hitting a second vehicle in front of him, which had come to rest because of congestion ahead. After the breaks are applied, a constant friction force of 8.00 103 N acts on the car. Ignore air resistance. (a) At what minimum distance should the brakes be applied to avoid a collision with the other vehicle? (b) If the distance between the vehicles is initially only 30.0 m, at what speed would the collisions occur?
- 22. Work and Kinetic Energy 3 v 0 35/,s m s m 1. m. 10 10 kg3 f 8 f k8 10 310 10 3 v 8 N v0 0 35 .00.mms.0, v /0,,0, m 0,00001.00 3 ,10k, kg, .00 .00.00 3 N N kg f k 35 / v 1 (a) We know v Find the minimum necessary stopping distance 1 2 1 2 Wnet W fric Wg WN W fric mv mv 1 22 f 2 i f k x 0 1 mv0 2 f k x 0 2 mv0 2 1 1 103 kg)(35.0m / s) 2 (8.00 108.N ) 103 N ) x (1.001.00 103 kg)(35.0m / s) 2 ( 00 x ( 2 2 3 x 76.6.6m x 76m February 11, 2014
- 23. Work and Kinetic Energy x 30 .0m, v0 35 .0m / s, m 1.00 10 3 kg, f k (b) We know Find the speed at impact. Write down the work-energy theorem: 1 2 Wnet W fric fk x mv f 2 2 2 v 2 v0 fk x f m v2 f vf 1 2 mvi 2 2 (35 m / s) 2 ( )(8.00 10 3 N )(30 m) 1.00 10 3 kg 27.3m / s 8.00 10 3 N 745 m 2 / s 2