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Question

A 5 kg block has a rope of mass 2 kg attached to its underside and a 3 kg block is suspended from the other end of the rope. The whole system is accelerated upwards at 2m/s2 by an external force F0.What is F0?
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A
15 N
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B
30 N
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C
60 N
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D
120 N
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Solution

The correct option is D 120 N
For calculating the value of F0 consider two blocks with the rope as a system F.B.D. of whole system.
F0100=10×2 ......... (i)
F0=120N

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