A block A of mass 7 kg is placed on a frictionless table. A thread tied to it passes over a frictionless pulley and carries a body B of mass 3 kg at the other end as shown in fig.The acceleration of the system is (g = 10 m/s2)

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100 m/s2

3 m/s2

10 m/s2

30 m/s2

answer is B.

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Detailed Solution

The acceleration of the system is given bya=M2gM1+M2=3×107+3=3 m/s2.

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