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?!