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# 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 give a velocity of 14 m/s to the heavier block in the direction of the lighter block. The velocity of center of mass is

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a
30 m/s
b
20 m/s
c
10 m/s
d
5 m/s

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detailed solution

Correct option is C

vcom=m1v1+m2v2m1+m2=10×14+4×010+4m/s⇒vcom=10m/s

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