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A block of mass m attached in the lower ...

A block of mass `m` attached in the lower and vertical spring The spring is hung from a calling and force constant value `k` The mass is released from rest with the spring initially unstreched The maximum value of extension produced in the length of the spring will be

A

1 Mg / k

B

2Mg / k

C

4Mg / k

D

Mg / 2k

Text Solution

Verified by Experts

The correct Answer is:
B
Work done in max extension = stored P.E.
`implies Mg xx x =1/2 kx^2`
`implies x = (2Mg)/(k)`
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