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rajan jha Grade: 12
        

 A person brings a mass of 1 kg from infinity to a point A. Initially , the mass was at rest but it moves at a speed of 3 m/s  as it reaches A. The work done by the person on the mass is -5.5J.The gravitational potential at A is ----------------------

6 years ago

Answers : (1)

vikas askiitian expert
510 Points
										

at infinity , V(potential) = 0          


at point A , V = Va


 workdone by gravitational force = mdV = m(Va-0) = mVa


 workdone by person is 5.5J


now , change in kinetic energy = net workdone


     1/2(mv2-0) = mVa - 5.5


   mVa =  4.5+5.5=10


      Va = 10V


thus potential of A is 10V

6 years ago
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