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i know angular momentum will be conserved here but unable to apply it..

so,
mu^2 = 2/3 (mx^2) * w^2
w^2 = 3u^2 /2x^2
nopes , not the right ans
why you used cons of energy ?

Are you sure you are getting the I right?

2/3 mx^2 ..i googled it!
though i can derive that also..

:P

what is the correct answer? I will try to solve it at some other time?

though that was an option which came by this method,
correct ans is
3u/2x

answer is 3v/4x..

yup.. I would be icm + ma^2/2

Use conservation of angular momentum, not of kinetic energy.

Moment of inertia about edge is correct.

ohh yes,,3u/4x..got it,,was easy..hmm

thanks all..