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2 bodies of different masses of 2 kg and...

2 bodies of different masses of 2 kg and 4 kg are moving with velocities `20 m//s` and 10 m//s towards each other due to mutual gravitational attraction. What is the velocity of their centre of mass?

A

5m/s

B

6m/s

C

8m/s

D

Zero

Text Solution

Verified by Experts

The correct Answer is:
D
As `v_(1)= 20 m//s, v_(2)= -10m//s`
`m_(1)= 2kg, m_(2)= 4kg`
`v_(CM)= (2 xx 20- 4 xx 10)/(2+4)= 0 m//s`
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