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A slab of mass 'm' is released from a he...

A slab of mass 'm' is released from a height x to the top a spring of force constant k. The maximum compression of the spring is y. Then

A

`mg x = 1/2 ky^2`

B

`mg (x + y) = 1/2 ky^2`

C

`mg (x + y) = 1/2 kx^2`

D

`mg x = 1/2 x (x + y)^2`

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The correct Answer is:
B
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