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Question

Question: 2 kg body falls from infinity to the surface of earth what will be the kinetic energy of the body on...

2 kg body falls from infinity to the surface of earth what will be the kinetic energy of the body on reaching the surface of Earth ? (Assume escape velocity to be 104ms–1)–

A

108J

B

1016J

C

1020J

D

1024J

Answer

108J

Explanation

Solution

Kinetic energy = 12\frac { 1 } { 2 }mve2 = 12\frac { 1 } { 2 }.2.104.104J= 108J