Sunday

April 20, 2014

April 20, 2014

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

**Related Questions**

Physics - A turntable with a moment of inertia of 0.017 kg*m^2 rotates feely at...

physics - A turntable with a moment of inertia of 0.014 kg*m2 rotates feely at ...

Physics - A turntable with a moment of inertia of 0.017 kg*m^2 rotates feely at ...

Physics - A circular disk of mass 0.3 kg and radius 40 cm, initially not ...

physics - Suppose that you measured the moment of inertia of the system as I = 5...

physics - A circular disk of mass 0.2 kg and radius 24 cm, initially not ...

physics - A circular disk of mass 0.2 kg and radius 24 cm, initially not ...

Physics - The moment of inertia of an object depends on the shape of the object...

Physics-moment of inertia PLEASE HELP - this is the question : A CD has a ...

physics - Suppose a 69 kg person stands at the edge of a 7.8 m diameter merry-go...