Questions
A body of mass m kg starts falling from a point 2R above the Earth's surface. Its kinetic energy when it has fallen to a point R above the Earth's surface [R: Radius of Earth, M:Mass of Earth, G: Gravitational Constant]
detailed solution
Correct option is B
Potential energy, U=−GMmr=−GMmR+hUinitial =−GMm3R and Ufinal =−−GMm2R Loss in PE= gain in KE=GMm2R−GMm3R=GMm6RTalk to our academic expert!
Similar Questions
A shell of mass M and radius R has a point mass m placed at a distance r from its centre. The gravitational potential energy U (r) vs r will be
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