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A uniform metal chain of mass m and length ‘L’ passes over a massless and frictionless pulley. It is released from rest with a part of its length ‘l’ is hanging on one side and rest of its length ‘L – l’ is hanging on the other side of the pulley. At a certain point of time, when l = L/x , the acceleration of the chain is g/2 .The value of x is ………

(A) 6 

(B) 2 

(C) 1.5 

(D) 4

1 Answer

+3 votes
by (67.9k points)
edited by
 
Best answer

Correct option is (D) 4

m= 3m1

(L- l) - 3l

L = 4l

l = L/4 

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