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The gravitational potential energy at a body of mass `m` at a distance `r` from the centre of the earth is U. What is the weight of the body at this distance ?A. `U`B. `Ur`C. `(U)/(r)`D. `(U)/(2r)` |
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Answer» Correct Answer - C Magnitude of gravitational potential energy, `U=(GMm)/(r)` or `U=(GMm)/(r^(2))xxr or U=gxxmr" "(becauseg=(GM)/(r^(2)))` or `U=(mg)r or mg=(U)/(r)` |
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