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December 20, 2014

December 20, 2014

Posted by **Anonymous** on Thursday, October 28, 2010 at 6:16pm.

- physics -
**drwls**, Thursday, October 28, 2010 at 6:41pmThe height of the hill H tells you the potential energy per unit mass, gH.

This equals the kinetic energy at the bottom in both cases.

In case (b), the KE per unit mass is just V squared.

In acase (a), rotational kinetic energy must be included, and the velocity will be less.

You will need to use the equation for the moment of inertia of a sphere.

We wll be happy to critique your work.

- physics -
**Anonymous**, Thursday, October 28, 2010 at 7:25pmOk thanks! I think I figured out the equation..

you use mgh=1/2mv^2 + 1/2Iw^2 and solve for v. right?

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