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ln the following arrangement the system is initially at rest. The 5 kg block is now released. Assuming the pulleys and string to be massless and smooth, the acceleration of block 'C' will be

a
zero
b
2.5 m/s2
c
107 m/s2
d
57m/s2

detailed solution

Correct option is D

Block B will not move. 5g - T = 5a------------(1)2T - 8g = 8a2---------(2)10g-2T = 10a      from (1)2g = 14aa = g7∴ a2 = g14 = 1014 = 57m/s2

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Two masses of I kg and 5 kg are attached to the ends of a massless string passing over a pulley of negligible weight. The pulley itself is attached to a light spring balance as shown in figure. The masses start moving during this interval; the reading of spring balance will be:


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