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In physics , energy is the quantitative property that must be transferred to an object in order to perform work on, or to heat , the object. The SI unit of energy is the joule , which is the energy transferred to an object by the work of moving it a distance of 1 metre against a force of 1 newton. Common forms of energy include the kinetic energy of a moving object, the potential energy stored by an object's position in a force field gravitational , electric or magnetic , the elastic energy stored by stretching solid objects, the chemical energy released when a fuel burns , the radiant energy carried by light, and the thermal energy due to an object's temperature. Mass and energy are closely related. Due to mass—energy equivalence , any object that has mass when stationary called rest mass also has an equivalent amount of energy whose form is called rest energy , and any additional energy of any form acquired by the object above that rest energy will increase the object's total mass just as it increases its total energy.

## JEE Main Work, Energy and Power Revision Notes

It is measured by the product of the force and the distance moved in the direction of the force, i. The work done W by the agent is the product of the component of force in the direction of displacement and the magnitude of displacement. The negative sign indicates that the direction of the spring force is opposite to x, the displacement of the free-end. Anything which is able to do work is said to possess energy. Energy is measured in the same unit as that of work, namely, Joule. ## Service Unavailable in EU region

Work Energy and Power can never be ignored as it covers basic concepts which provides a smooth access to the next some topics in Mechanics. The terms work, energy and power have specific meanings in Physics. Work is done when a force produces motion. To do work, energy is required. This energy we acquire from the food which we eat and if work is done by machine, then energy is supplied by fuels or by current. There are various forms of energy — kinetic energy, potential energy, heat energy, chemical energy, electrical energy, nuclear energy etc. Chapter 6: Work, Energy and Power. Tuesday February 10th. Reading: up to page 88 in the text book (Ch. 6). • Finish Newton's laws and circular motion.

## Work and Energy-Notes

The notes on the work power and energy are given below. The basic theorem for work, power and energy can be defined as the difference between two kinetic energies obtained by a single object by the change of force. It can be written as,.

The principle of work and kinetic energy also known as the work-energy theorem states that the work done by the sum of all forces acting on a particle equals the change in the kinetic energy of the particle. This definition can be extended to rigid bodies by defining the work of the torque and rotational kinetic energy. Kinetic Energy : A force does work on the block. The kinetic energy of the block increases as a result by the amount of work.

Download revision notes for Work, Energy and Power class 11 Notes and score high in exams. These are the Work, Energy and Power class 11 Notes prepared by team of expert teachers. The revision notes help you revise the whole chapter in minutes. Revising notes in exam days is on of the the best tips recommended by teachers during exam days. The work-energy theorem states that the change in kinetic energy of a body is the workdone by the net force on the body. Register Now. Hey there!

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Whenever a force makes a body move, then work is said to be done. But for doing work, energy is required. When work is done by human beings, machines or animals they get energy from the food which they eat and if work is done via machines, then energy is supplied by fuels or by electricity. So, we can say that when work is done an equal amount of energy is used up. This article deals with the summary of Work, Power and Energy , its mechanism, formulas and how they are related to each other in a crux form which not only clear your concepts but also help in your preparation and in solving problems. Work can be done when a force produces a motion. For e.

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Power is a scalar quanity. object is the sum of its potential and kinetic energy. Define the work done as the product of the applied on an object and the displacement in the direction of the force. Work is a scalar quantity (as it is the product of two vector quantities).

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