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Question

A combination of a movable pulley P1 with a fixed pulley P2​ is used for lifting up a load W. If the free end of the string moves through a distance x, find the distance by which the load W is raised.


A

x

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B

2 x

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C

x/2

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D

x2

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Solution

The correct option is C

x/2


As the thread attached to the pulley P1​ has to move equally on both the sides of the pulley, therefore if the free end of the string moves a distance of x then the load attached to P1​ moves through a distance x2.


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