This isn't one of those textbook problems, but it's still homework, so I thought it'd be okay to post this here. 1. The problem statement, all variables and given/known data I have a wheel with brake pads that generate heat through friction. Everything except the velocities are constant, and I'm trying to figure out equations to test if my idea is a viable concept. How I worked it is I took the difference in KE of the wheel with and without the brake pads active and used that as my heat transfered from the brakes. Assuming that is right, as is all my work, I came up with the final equation and my statements to use the equation. I need to know if these are right. I tried to make it as readable and easy to follow... http://img149.imageshack.us/img149/975/frictionbz2.jpg [Broken] 2. Relevant equations K=.5mv^2 Q=mcT 3. The attempt at a solution If this is right, or even if it isn't, is there an easier way to test how practical my concept is? Like taking the average force of a person and compare it to the force needed to generate the heat? If thats possible, how would I go about doing so?