Posted by **kelsey** on Saturday, October 18, 2008 at 2:22am.

When a pitcher throws a curve ball, the ball is given a fairly rapid spin. A 0.15 kg baseball with a radius of 3.7 cm is thrown with a linear speed of 41 m/s and an angular speed of 37 rad/s. Assume that the ball is a uniform, solid sphere.

Calculate how much of its kinetic energy is rotational.

- physics help 2!! -
**bobpursley**, Saturday, October 18, 2008 at 3:43am
You need the moment of inertia for a solid sphere, look it up.

rotationalKE=1/2 I w^2

translation KE=1/2 m v^2

- physics help 2!! -
**kelsey**, Monday, October 20, 2008 at 4:14am
thank you very much, I got the translational, but cant get the rotational. What do I use for v?, do I convert the rad/s?

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