Rotational Motion Question 154

Question: Two bodies of masses 2 kg and 4 kg are moving with velocities 2 m/s and 10 m/s respectively along same direction. Then the velocity of their centre of mass will be

Options:

A) 8.1 m/s

B) 7.3 m/s

C) 6.4 m/s

D) 5.3 m/s

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Answer:

Correct Answer: B

Solution:

[b]

vcm=m1v1+m2v2m1+m2=2×2+4×102+4=7.3 m/s



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