A block `A` of mass `m` is give a velocity `v_(0)` towards another block `B` of sae mass `B`. Is attached to an ideal spring of spring constant `K`. `A` makes a head on perfectly inelastic collision with `B`.
Answer the following two questions:
Q. Let the collision takes place at time `t=0` choose the instant (s), when the spring is in its natural length.

Options

A. `pisqrt((2m)/(K))`
B. `2pisqrt((2m)/(K))`
C. `pisqrt((m)/(K))(sqrt(2)+1)`
D. `2pisqrt((m)/(K))`

Answer

A, C