Two bodies of masses 
and 
initially at rest at infinite distance apart move towards
each other under gravitational force of attraction. Their relative velocity of approach when they are separated by a distance r is 
universal gravitational constant.)
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
Loss in potential energy = gain in KE
Loss in 
… ..(i)
If 
and 
are their respective velocities when they are a distance r apart then, from law of conservation of momentum.
…… ..(ii)
From Eqn. (i) and Eqn. (ii),
Therefore, their relative velocity of approach is
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