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NEET 2013 Physics question

PhysicsGravitationNEET 2013

A body of mass is taken from the earth's surface to the height equal to twice the radius () of the earth. The change in potential energy of body will be -

Answer: (2)

Solution

Potential energy at distance from the centre is , and . At the surface . At height , , so . $Δ U =

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Question ID VK-091304