Two particles A and B, initially at rest, start moving towards each other under a mutual force of attraction. When the speed of A is 10 m/s and the speed of B is 800 m/s , what is the speed of their centre of mass?

Two particles A and B, initially at rest, start moving towards each ot

1.	Two particles A and B, initially at rest, start moving towards each other under a mutual force of attraction. When the speed of A is 10 m/s and the speed of B is 800 m/s , what is the speed of their centre of mass?
A.	0
B.	0.8v
C.	80v
D.	8v
Answer» B. 0.8v

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Two particles A and B, initially at rest, start moving towards each other under a mutual force of attraction. When the speed of A is 10 m/s and the speed of B is 800 m/s , what is the speed of their centre of mass?

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