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A child of 35 kg is sitting on a trolley of mass 5 kg . the trolley is given a push by applying a force so that it begins to move with a speed of 4 m/s.

the trolley comes to rest after covering a distance of 16 m. find:
1) the work done on the trolley .
2) the work done by the trolley before coming to rest ..


1) Work done on trolley = K.E. imparted to it = ½(35+5)(4)² = 320 J.
2) Work done by trolley before coming to rest = -∆K.E. = -320 J.
0 0 0
can u explain the 2 one
Work done by a system = Energy lost by the system
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