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The system shown in th fig is released f...

The system shown in th fig is released from rest. (Neglecting friction and mass of the pulley, string and spring). The spring can be elongated:

A

`ifMgtm`

B

`ifMgt2m`

C

`ifMgtm//2`

D

for any value of M

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Verified by Experts

The correct Answer is:
4
`a=("Mg")/("M+2m"),` since a `lt`g so there should be an upward force on M so `lt`g so for any value of M spring will elongated.
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