# physics help 2!!

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.

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asked by kelsey
1. 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

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2. 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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posted by kelsey

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