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Acceleration in 2D

The system sh...

Question

The system shown in figure is in equilibrium. The string between $A$ and $B$ is cut. The acceleration of block $B$ will be?

A

g

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B

g / 3

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C

0

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D

None of these

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Solution

The correct option is A $g$
when the string is cut
force acting on the body is mg
mg=ma
acceleration=g

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