Problem 13.30(adsbygoogle = window.adsbygoogle || []).push({});

A thin, 60.0g disk with a diameter of 7.00 cm rotates about an axis through its center with 0.240 J of kinetic energy. What is the speed of a point on the rim?

2. Relevant equations

m=.06kg

r=.035m

KE=.240J

3. The attempt at a solution

K=(1/2)*I*(w^2)

I=(1/2)*M*R^2

I'm using the formula above but I'm not getting the right answer. My numbers seem way to small. I eventually get w(omega) alone. Where do I go from here. Do i need to solve for the length to figure out rad/s then convert to m/s?

Perhaps I am approaching this wrong.

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# Homework Help: Kinematics Spinning Disk

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