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Question

In the figure , the pulley P moves to the right with a constant speed u. The downward speed of A is vA, and the speed of B to the right is vB.
590257_673cca199147478e90ffd8a4df3b4705.png

A
vB=vA+u
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B
vA=vB+u
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C
vB=vA
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D
The two blocks have accelerations of the same magnitude
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Solution

The correct options are
C vB=vA
D The two blocks have accelerations of the same magnitude
Since the rope is not slag , So the acceleration and velocity of both the object has to be same . So the velocity of A vA is equal to the velocity of B vB. Same is valid of acceleration. a=aA=aB

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