Two particles A and B, initially at rest, move towards each other unde – McqOptions

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1.	Two particles A and B, initially at rest, move towards each other under mutual force of attraction. At the instant when the speed of A is v and the speed of B is 2v, what is the speed of mass of the system?
A.	3v
B.	v
C.	Zero
D.	1.5v
Answer» D. 1.5v

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