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A 2 kg block moving with 10m//s strikes ...

A `2 kg` block moving with `10m//s` strikes a spring of constant `pi^(2)N//m` attached to `2Kg` block at rest kept on a smooth floor. The time for which rear moving block remain in contact with spring will be-

A

`sqrt(2)` sec

B

`(1)/(sqrt(2))` sec

C

1 sec

D

1/2 sec

Text Solution

Verified by Experts

The correct Answer is:
C
`T=2pisqrt((mu)/(k))`
`T=(2pi)/(pi)impliesT=2sec`
Required time `=(T)/(4)+(T)/(4)=(T)/(2)=1sec`.
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