Question

A force of 10 N acts for 20 second on a body of mass 2 kg initially at rest. Calculate
the energy required by the body and the workdone by the applied force.​

Answer 1

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Answer 2

Answer:

F=10N,m=20kg,t=10s

a= F/m= 10/20 =0.5m/s2

v=u+at=0+0.5×10=5m/s

Change in momentum =m(v−u)=20(5−0)=100kgm/s

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