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Question

The Gravitational P.E of a body of mas m at the earth's surface is -mg Re. Its gravitational potential energy at a height Re from the earth's surface will be = here (Re is the radius of the earth),

  1. -2mgRe
  2. 2mgRe
  3. 1 halfmgRe
  4. -negative 1 half m gRe

The correct answer is: -negative 1 half m gRe

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