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Q.

Assuming all the surfaces to be frictionless, acceleration of the block C shown in the figure is

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a

3.5  m/s2downwards

b

3.5 m/s2 upwards

c

5 m/s2 Upwards

d

5 m/s2 downwards

answer is C.

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Detailed Solution

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According to work – energy theorem

−TxA−TxB+2TxC=0 2aC=aA+aB aC=4+32 aC=3.5 m/s2 upwards

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Assuming all the surfaces to be frictionless, acceleration of the block C shown in the figure is