# Work power and energy formulas pdf

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Power is the rate at which work is done. Mathematically, it is computed using the following equation. The standard metric unit of power is the Watt. As is implied by the equation for power, a unit of power is equivalent to a unit of work divided by a unit of time.

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In physics , work is the energy transferred to or from an object via the application of force along a displacement. In its simplest form, it is often represented as the product of force and displacement. A force is said to do positive work if when applied it has a component in the direction of the displacement of the point of application. A force does negative work if it has a component opposite to the direction of the displacement at the point of application of the force. For example, when a ball is held above the ground and then dropped, the work done by the gravitational force on the ball as it falls is equal to the weight of the ball a force multiplied by the distance to the ground a displacement. Work is a scalar quantity , [1] so it has only magnitude and no direction. Work transfers energy from one place to another, or one form to another.

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.

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Register Now. Hey there! We receieved your request. This signifies, when the force and displacement are in same direction, work done is positive. This work is said to be done upon the body. This signifies, when the force and displacement are in opposite direction, work done is negative.

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Any force which conserves mechanical energy, as opposed to a nonconservative force. See statement of conservation of mechanical energy. Property of conservative forces which states that the work done on any path between two given points is the same.

In these notes a brief and simple explanation of all important topics is given which will help students make an easy and quick revision of the chapter during the examinations. Though these notes we bring a brief description of the important topics from the chapter which will help you revise the whole chapter quickly and easily during exam days. At the end of the notes you can try the questions asked from the discussed set of topics. These questions will help you to assess your preparation level and get a hold on the subject. It is expressed as the product of force and displacement in the direction of force.

• #### Raobummebe 30.05.2021 at 07:27

Work, Energy and Power formulae hampdenlodgethame.org Work of a constant force. (Force is parallel to displacement). (Work of force of friction) α cos. xF.

#### Pb96

Draw a force diagram and free body diagram. • Calculate the net work done on an object using the equation Wnet = Fnet∆xcosθ. • Define energy as the ability to​.

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