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Earn 100

The work done by all the forces (external and internal) on a system equals the change in
(a)total energy
(b)kinetic energy
(c)potential energy
(d)none of these

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Important Questions on Work, Energy and Power
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A force acting on an object varies with distance as shown here. The force is in and is in The work done by the force in moving the object from to is

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A block weighing travles down a smooth curved track joined to a rough horizontal surface (figure). The rough surface has a friction coefficient of with the block. If the block starts slipping on the track from a. point above the horizontal surface, the distance it will move on the rough surface is:
