1. The problem statement, all variables and given/known data http://i43.tinypic.com/i1bq1i.jpg I need help with number 9 2. Relevant equations Wnet=change in KE Wnc=Change in Energy 3. The attempt at a solution so I'm assuming the energy dissipated means the work done by friction? so work of friction is umgcos(15)*d d=cos(15)h I got that work of friction is -9.8257 Help?