Two blocks of 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 `14 m//s` to the heavier block in the direction of the lighter block. The velocity of the centre of mass isA. `30ms^(-1)`B. `20ms^(-1)`C. `10ms^(-1)`D. `5ms^(-1)`

Two blocks of masses 10 kg and 4 kg are connected by a spring of negli

1.	Two blocks of 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 `14 m//s` to the heavier block in the direction of the lighter block. The velocity of the centre of mass isA. `30ms^(-1)`B. `20ms^(-1)`C. `10ms^(-1)`D. `5ms^(-1)`
Answer» Correct Answer - C Velocity of center of mass, `v_(CM) = (10(14)+4(0))/(10 +4) = 10 ms^(-1)`

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