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 energyU=−GMmr=−GMmR+hUinitial=−GMm3R and Ufinal=−−GMm2RLoss in PE = gain inKE=GMm2R−GMm3R=GMmR12-13=GMmR3-26=GMmR16Talk 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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