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Two blocksof masses 10 kg and 4 kg are c...

Two blocksof masses 10 kg and 4 kg are connected by a spring of negligible mass and placed on a frictionless horizontal surface. An impulse gives a velocity of 14m/s to the heavier block in the direction of the lighter block. The velocity of the centre of mass is :

A

5 m/s

B

10 m/s

C

20 m/s

D

30 m/s

Text Solution

Verified by Experts

The correct Answer is:
B
Let `V_(c )` be the velocity of centre of mass.
`therefore` By conservation of linear momentum
`MV=(M+m)V_(C)`
`V_(C)=(10xx14)/(10+4)=10ms^(-1)`
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