Questions
Energy required to move a body of mass m from an orbit of radius 2R to 3R is
a
GMm/12R2
b
GMm/3R2
c
GMm/8R
d
GMm/6R
detailed solution
Correct option is D
Change in potential energy in displacing a body from r1 to r2 is given by ΔU=GMm 1r1−1r2=GMm 12R−13R=GMm6RTalk to our academic expert!
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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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