Two particles A and B initially at rest move towards each other under a mutual force of attraction. At the instant when the speed of A is 3V and the speed of B is 4v, the speed of the centre of mass of the system is
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a
0
b
V
c
1.5V
d
2.5V
answer is A.
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Detailed Solution
There is no external force. As they are initially ate rest , com is also at restV¯cm=0