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Questions  

For the pulley system shown, each of the cables at A and B is given a velocity of 2 m/s in the direction of the arrow. Determine the upward velocity v of the load m.

a
1.5 m/s
b
3 m/s
c
6 m/s
d
None of these

detailed solution

Correct option is A

VA = 2 m/s   (towards right)VP1 = VA2 =  1 m/s   (upwards)VB = 2 m/s         (towards left)Now 2Vp2 = VB+VP1VP2 = VB+VP12 = 2+12 = 1.5 m/s

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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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