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A wad of sticky clay (mass m, velocity v), is fired at a solid cylinder (mass M, radius R). The cylinder is initially at rest and rotates on an axis through the center of mass. The line of motion of the projectile is perpendicular to the axis of rotation and at a distance d < R from the center.

Find the angular speed of the cylinder just as the clay hits the surface.

I am trying to use conservation of momentum to solve this.

we can say, i suppose, that :

[tex] L_{clay final}-L_{clay initial} = L_{cylinder final} [/itex]

Now i have know idea what to substitute for these values. I know

L= R x mv, or for the rotating cylinder L=Iw, but for the initial angular momentum of the clay, do i find R? Somehow, d ends up in the final answer. Can someone show me the correct way to set this one up.

Thanks

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# Homework Help: Angular Momentum

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