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Question

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. The acceleration of the system is (given g=10 ms−2)


A

100 ms2

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B

3 ms2

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C

10 ms2

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D

30 ms2

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Solution

The correct option is B

3 ms2


a=[m2m1+m2]g=[37+3]10=3m/s2


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