Q.
What is gravitational potential energy of system consisting of two concentric spherical shells of mass, m, and 4 m and radii R and 2 R.
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a
−2Gm2R
b
−9Gm22R
c
−5Gm22R
d
−13Gm22R
answer is D.
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Detailed Solution
Usys=Uself 1,+Uself 2,+Uinteraction =−Gm22R−12G(4m)22R−Gm4m2R =−13Gm22R
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