1. The problem statement, all variables and given/known data 2. Relevant equations The block has potential energy U at the top of the ramp, and this is transfered to kinetic energy K at the bottom, which is then trasnfered to work done by friction, Wfr. U = K Conservation of energy K = Wfr Conservation of energy g = 10 m/s2 3. The attempt at a solution U = mgh = 3*45*10 = 1350 J 1350 J = Wfr = Ffr * d = m*g*u*d = 3*10*1*d 1350 = 30*d d = 45 m This does not match the answers. Am I doing anything wrong?