1. The problem statement, all variables and given/known data A 22.9-kg girl slides down a playground slide with a vertical drop of 3.29 m. When she reaches the bottom of the slide, her speed is 1.34 m/s. How much energy was dissipated by friction? 2. Relevant equations I used [tex]\Delta[/tex]KE + [tex]\Delta[/tex]PE = 0 3. The attempt at a solution I got KEinitial = 0 KEfinal = 1/2 * 22.9kg * (1.34)2 = 20.56 I got PEinititial = m * g * h = 22.9 * 9.8 * 3.29 = 738.34 PEfinal = 0 20.56 (Friction) = 738.34 Is that on the right track? Where would I go from there?