1. The problem statement, all variables and given/known data Consider a solid disk of mass m and radius R rolling along a horizontal surface with the center of the disk moving horizontally with a speed v. The total kinetic energy of the disk is a combination of translational kinetic energy , KEt and rotational kinetic energy, KEr. Find the ration KEt/KEr 2. Relevant equations 3. The attempt at a solution I basically broke down the equations into their simplest forms to try to find the relationship. So E = 1/2mv^2 + 1/2IW^2 E = 1/2mv^2 + 1/2 (1/2mR^2)w^2 E = 1/2mv^2 + 1/4mR^2 * W^2 I am really not sure how to how about solving this problem. I know I could make up some imaginary numbers for the variables and just guess and check for the relationship but I would prefer to solve this algebraically. The correct answer is 2.