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A uniform of rope length L and mass M is...

A uniform of rope length `L` and mass `M` is placed on a smooth fixed wedge as shown. Both ends of rope are at same horizontal level. The rope is initially released from rest, then the magnitude of initial acceleration of rope is.

A

zero

B

`(cos alpha - cos beta) g`

C

`(tan alpha - tan beta) g`

D

`(sin alpha - sin beta) g`

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The correct Answer is:
D
Considering A and B as a system. There is no vertical force in upward direction to support their weight. Therefore, the system cannot remain in equilibrium.
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