Rotation - collision with an obstacle

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cupid.callin
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Homework Statement


attachment.php?attachmentid=33660&stc=1&d=1301349871.jpg



The Attempt at a Solution



First i thought i could apply conservation of momentum about O

but about O ... mg has a torque ... now what to do ?
 

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hi cupid.callin! :smile:
cupid.callin said:
but about O ... mg has a torque ...

but not an impulsive torque :wink: