Two blocks of masses m = 5 kg and M = 10 kg are connected by a string passing over a pulley B as shown. Another string connects the centre of pulley B to the floor and passes over another pulley A as shown. An upward force F is applied at the centre of pulley A. Both the pulleys are massless. The accelerations of blocks m and M, if F is 300 N are (Take, g = 10 ms-2)

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5 ms-2, zero

zero 5 ms-2

zero, zero

5 ms-2, 5ms-2

answer is A.

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Detailed Solution

F4=75 N or F4<100 NTherefore, aM=0,am=75-505=5 m/s2

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