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Two blocks A (5kg) and B(2kg) attached ...

Two blocks `A (5kg)` and `B(2kg)` attached to the ends of a spring constant `1120N//m` are placed on a smooth horizontal plane with the spring undeformed. Simultaneously velocities of `3m//s` and `10m//s` along the line of the spring in the same direction are imparted to `A` and `B` then

A

when the extension of the spring is maximum the velocities of `A` and `B` are zero.

B

the maximum extension of the spring is 25cm.

C

maximum extension and maximum compression occuur alternately.

D

the minimum speed of `B` is 0.

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B, C, D
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