In the pulley-block system shown in figure strings are light, the pulleys are light and smooth. The system is released from rest. At t = 0.3 s

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work done on 2 kg block by gravity is 6J

work done on 2 kg block by string is -2J

work done on 1 kg block by gravity is -1.5J

work done on 1 kg block by string is 2J

answer is A.

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Detailed Solution

Using the concepts of Laws of Motion and Kinematics we can draw following diagrams and then using the definition of work, we can find Corresponding work done.For 1 kg body 2T-10=2a2 for 2 kg body 20-T=2a solving the two equation we get T=203N

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