Two particles of masses m and M are initially at rest at infinite distance. Find their relative velocity of approach due to gravitational attraction when d is their separation at any instant.
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a
2G(M+m)d
b
G(M+m)d
c
G(M+m)2d
d
G(M+m)4d
answer is A.
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Detailed Solution
12μvr2=Ui-Uf Here, μ= reduced mass =mMM+m∴ 12mMvr2m+M=0--GMmdHence, reIative veIocity, vr=2G(M+m)d