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In the arrangement shown in Fig. 15.3.15...

In the arrangement shown in Fig. 15.3.15 the ends P and Q of an unstretchable string move downwards with uniform speed U. Pulleys A nd B are fixed. Mass M moves upwards with a speed.

A

2 U ` cos theta`

B

U ` cos theta`

C

2 `U//cos theta`

D

`U//cos theta`

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The correct Answer is:
d
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