(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A stationary uniform-density disk of radius 0.8m is mounted in the vertical plane. The axle is held up by supports that are not shown and is frictionless. The disk has a mass of 3.6 kg. A lump of clay with mass 0.3 kg falls and sticks to the outer edge at <-0.48, 0.64, 0>m. Before impact it has a speed 8 m/s and the disk is rotating clockwise with angular speed 0.4 radians/second. Just before impact, what is the magnitude of the angular momentum about the center. System=disk+clay, about the center (<0,0,0>)

2. Relevant equations

I know that it has something to do with:

Ltot=Lrot+Ltrans

Lrot=Iw, where I=.5*mR^2 and w is given? (the disk)

Ltrans=mrv, where the r here equals where it sticks? (the clay)

3. The attempt at a solution

I tried plugging the numbers given into this equation, but the answer isn't right.. (the answer is 0.6912 kg*m^2/s) Angular momentum is a vector, so i assumed we'd use the vector position given. What am i doing wrong?

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# Angular Momentum of Disk Question

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