a 2.1x10^3 kg car starts from rest at the top of the driveway that is sloped at an angle of 20 degree with the horizontal. an av
erage friction force of 4.0x10^3 N impedes the cars motion so that the cars speed at the bottom of the driveway is 3.8 m/s. what is the length of the driveway?
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When a force causes a body to move, work is done on the object by the force. Work is the measure of the energy transfer when a force 'F' moves an object through a distance 'd'. So we say that energy is transferred from one energy store to another when work is done, and therefore, energy transferred = work done.