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
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 occur alternately.
- D
Both $(B)$ and $(C)$
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