(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A 0.125kg basketball is rolling w/out slipping on a horizontal table at 4.50 m/s when it rolls off the edge and it falls to the floor, 1.10 m below. What is the rotational kinetic energy of the ball right before hitting floor?

2. Relevant equations

KE rot: .5 I w^2

KE translational: .5 m v^2

PE: mgh

3. The attempt at a solution

Initial: I figured out KE translational and PE for the initial conditions on the horizontal surface, these are easy.

I do not know how to get K rotational energy!

Final: I used vertical constant acceleration equations to find the final velocity. Then I got the kinetic energy right before hitting the floor. Potential energy is 0.

No idea how to get K rot energy!

I've been working on this problem forever (all morning). The answer to the problem is apparently 0.506J.

HOW?!

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# Homework Help: Find final rotational kinetic energy without knowing radius?

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