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A block of mass 10 kg slides down on an ...

A block of mass 10 kg slides down on an incline 5 m long and 3 m high. A man pushes up on the ice block parallel to the incline so that it slides down at constant speed. The coefficient of friction between the ice and the incline is 0.1. Find :
(a) the work done by the man on the block.
(b) the work done by gravity on the block.
(c) the work done by the surface on the block.
(d) the work done by the resultant forces on the block.
(e) the change in K.E. of the block.

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