When a force moves an object, energy is transferred and work is done.
If an object moves a force has to be applied to it. This force needs a supply of energy from somewhere, such as electricity or fuel.
When work is done moving the object, the supplied energy is transferred to the object so the work done is equal to the energy transferred.
Work and energy have the unit joule(J).
When work is done against frictional forces, the energy supplied is mainly transformed into heat.
Work done (J) = force(N) x distance moved in the direction of the force(m)
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