Two particles A and B which are initially at rest move towards each other under the mutual force of attraction. At the instant when the speed of A is v and the speed of B is 2v. the speed of the centre of mass of the system is -
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a
v
b
1.5v
c
3v
d
zero
answer is D.
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Detailed Solution
Fext=0; acm=0 Since initial velocity of centre of mass is zero , velocity of centre of mass is always zero .
Two particles A and B which are initially at rest move towards each other under the mutual force of attraction. At the instant when the speed of A is v and the speed of B is 2v. the speed of the centre of mass of the system is -