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Question

Two masses M and m are connected by a weightless string. They are pulled by a force F on a frictionless horizontal surface. The tension in the string will be
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A
MFm+M
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B
MFMm
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C
mFM+m
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D
mFMm
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Solution

The correct option is A MFm+M
As acceleration of the entire mass due to force F is a=FM+m
so tension in M block is T=M×a=M×(FM+m)

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