A child of mass 35kg is sitting on a trolley of mass 5kg.the trolley is given a push by applyinga force so that it begins to move with a speed of 4 m/s.the trollye comes to rest after covering a distance of 16m find1) work done on the trolley2) work done by the trolley before coming to rest

A child of mass 35kg is sitting on a trolley of mass 5kg.the trolley i

1.	A child of mass 35kg is sitting on a trolley of mass 5kg.the trolley is given a push by applyinga force so that it begins to move with a speed of 4 m/s.the trollye comes to rest after covering a distance of 16m find1) work done on the trolley2) work done by the trolley before coming to rest
Answer» TOTAL mass of system=35+5=40kg initial velocity(U)=4m/s distance COVERED(s)=16m final velocity(V)=0m/s work DONE by trolley=v²-u²=2as 16=2a×16 a=1/2 f=m×a f=40×1/2 =20N w=f×s=20×16 =320J

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8- A girl of mass 35 kg site on trolley of mas 5kg.initial velocity of trolley is im/s Come to rest after travelling 16m.find work done on trolley.come to meet after thavelling 16 m(a) work done ou trolley(b) work done by girl
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A child of mass 35kg is sitting on a trolley of mass 5kg.the trolley is given a push by applyinga force so that it begins to move with a speed of 4 m/s.the trollye comes to rest after covering a distance of 16m find1) work done on the trolley2) work done by the trolley before coming to rest

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