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## Homework Statement

http://tycho.physics.wisc.edu/courses/phys201/fall06/Discussion/Disc14Solution.pdf [Broken]

problem 38, part b)

## Homework Equations

I final w final = I initial w initial

## The Attempt at a Solution

I understand that the snowball is introducing a net torque and I know that torque = (force applied) x (distance from axis of rotation) (in this case). I am just unsure how the torque was calculated as mvL. I know L is the distance, but isn't mv the momentum of the ball?

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