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In physics, work is the transfer of energy to or from a material body that causes its motion in space. Work is performed when a force causes a body to be displaced or move a specified distance in the direction of the force. The mathematical equation for work is W (work)=f (force) x d (distance). Work is usually expressed in joules or ergs.

Work is another name for energy, when there is movement.

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9y ago

Work takes place when a force, F , acts through a distance in the direction that the force is acting.

Work requires two things :
( 1 ) a force, F
( 2 ) the force acting through a distance

For reversible work:

W = Integral [ F dx ] xi ----> xf

For gas confined to a cylinder with a movable piston, the reversible work is :

WB = Integral [ P dV ] Vi ----> Vf

Work units include :

ft - lbf ; N - m ; Btu ; and Joules


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Q: How does physics define the word 'work'?
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The word 'work' in physics is defined as the transfer of energy from one material body to another. It is a body's displacement in space caused by an external force resulting in motion. If a force is applied but there is no displacement or motion, then no work is done. Also work is not done if a force is applied perpendicular to the body's displacement. Work is expressed in units such as joules or foot-pounds.

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