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A block of mass 2 kg is on a smooth hori...

A block of mass `2 kg` is on a smooth horizontal surface. A light of force constant `800 N//m` has one end rigidly attached to a vertical wall and lying on that horizontal surface. Now the block is moved towards the wall compressing the spring over a distance f `5 cm` and then suddenly released. By the time the spring regains its natural length and looses contact with the block, the velocity acquired by the block will be

A

`200 m//s`

B

`100 m//s`

C

`2 m//s`

D

`1 m//s`

Text Solution

Verified by Experts

The correct Answer is:
D
`(1)/(2) Kx^(2) = (1)/(2) mv^(2)`.
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