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Question

# In the system shown in figure mA=4m,mB=3m and mC=8m. Friction is absent everywhere. String is light and in-extensible. If the system is released from rest find the acceleration of block B

A
g8 (leftward)
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B
g2 (leftward)
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C
g6 (rightward)
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D
g4 (rightward)
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Solution

## The correct option is B g2 (leftward)When the system is released from the position of rest, the equations of motions are given as, 4a=4g−T (1) T=3a (2) From the equation (1) and (2) it can be written as, 7a=4g a=4g7 a≈g2 Thus, the acceleration of block B is g2 towards the left side.

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