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Q.

A point sized sphere of mass ‘m’ is suspended from a point using a string of length'l' . It is then pulled to a side till the string is horizontal and released. As the mass passes through the portion where the string is vertical, magnitude of its angular momentum is

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a

mlgl

b

ml3gl

c

ml2gl

d

mlgl/2

answer is B.

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Detailed Solution

l=mvr

r=R

v=2gl

L=ml2gl

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