1. The problem statement, all variables and given/known data The mass 0.40 kg is released and slides down the incline. The maximum velocity ( taken the instant before the mass reaches the bottom of the incline ) is 1.00 m/s. What is the kinetic energy at that time? What percentage of the potential energy of the system is not converted into kinetic energy due to friction? (converted into heat instead) My question is with part b, and the percentage of potential energy lost due to friction. 2. Relevant equations U=mgh k=(1/2)mv^2 3. The attempt at a solution The answer to question a, which is the amount of Kinetic Energy was 0.2 Joules. However, I had no idea how to start part b. Any help is appreciated, thanks!