1. The problem statement, all variables and given/known data A small sphere is released from rest and after falling a vertical distance h freely under gravity, bounces on a smooth inclined plane ( at an angle theta less than 90 degrees to hotizontal ). Given that there is no energy loss on impact, in what direction will it move after impact? Show the dist. down the plane between this impact and the next is 8hsintheta.. 2. Relevant equations Not sure? 3. The attempt at a solution I guess you choose axis parallel and perp to the plane..but im not sure what to do next..? Confused :S Which equations/physical principles can I use? Do i write equations of motion?