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March 4, 2015

March 4, 2015

Posted by **Unknown** on Tuesday, May 10, 2011 at 7:57pm.

a) Find the new angular speed.

b) What is the change in kinetic energy?

- Physics -
**drwls**, Tuesday, May 10, 2011 at 9:50pma) Angular momentum about the spindle is conserved.

Iturntable*w1 = (Iturntable+Icd)w2

Solve for the final angular velocity w2.

b) (1/2)*Iturntable*w1^2 - (1/2)(Iturntable + Icd)*w2^2

The formula for the compact disc moment of inertia Icd is:

Icd = (1/2)Mcd*Rcd^2

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