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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 ----------------------

rajan jha , 15 Years ago

Grade 12

1 Answers

vikas askiitian expert

at infinity , V(potential) = 0

at point A , V = V_a

workdone by gravitational force = mdV = m(V_a-0) = mV_a

workdone by person is 5.5J

now , change in kinetic energy = net workdone

1/2(mv²-0) = mV_a - 5.5

mV_a = 4.5+5.5=10

V_a = 10V

thus potential of A is 10V

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Last Activity: 15 Years ago

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Mechanics> new 15...

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 ----------------------

rajan jha , 15 Years ago

vikas askiitian expert

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