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In the arrangement shown in the Fig, the...

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

A

`2ucostheta`

B

`u//costheta`

C

`2u//costheta`

D

`ucostheta`

Text Solution

Verified by Experts

The correct Answer is:
B

`x^(2)+y^(2)+t^(2)`
`2x(dx)/(dt)+2y(dy)/(dt)=2t(dl)/(dt)`
`(dx)/(dt)=0`, since x is constant
`v_(y)=(u)/(y//l)=(u)/(costheta)`
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  11. In the arrangement shown in the Fig, the ends P and Q of an unstretcha...

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  12. In the figure, the blocks are of equal mass. The pulley is fixed. In t...

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