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Two bodies of different masses of 2 kg a...

Two bodies of different masses of 2 kg and 4 kg are moving with velocities `2 ms^-1` and `10 ms^-1` towards each other due to mutual gravitational attraction. What is velocity of their centre of mass?

A

`-5 m s^_1`

B

`-6 m s^(-1)`

C

`-8 m s^(-1)`

D

zero.

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