A block of mass m is attached to one end of a light string which is wrapped on a disc of mass 2m and radius R. The total length of the slack portion of the string is 1. The block is released from rest. The angular velocity of the disc just after the string becomes taut is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
Using the principle of conservation of angular momentum,
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