Two particles A and B initially at rest, move towards eachother by mut – InterviewSolution

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1.	Two particles A and B initially at rest, move towards eachother by mutual force of attraction. At the instant when thespeed of A is v and the speed of B is 2v, the speed of thecentre of mass of the system is(a) 3 v(c) 1.5 v(1982, 3M)(b) v(d) zero
Answer» <p>At initial position both A and B are at rest, hence momentum is zero. It is given that no external force is acting on them .So, momentum remains zero. Since mass cannot be zero, therefore velocity is zero.</p>

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