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Questions  

A wire elongates by / mm when a load Wis hanged from it. If the wire goes over a pulley and two weights W each are hung at the two ends, the elongation of the wire will be (in mm): 

a
0
b
l/2
c
l
d
2l

detailed solution

Correct option is C

TENSION or stretching force is same in both the cases and hence elongation is same in both the cases.

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