1. The problem statement, all variables and given/known data A sled with rider having a combined mass of 130kg travels over the perfectly smooth icy hill shown in the accompanying figure. 2. Relevant equations How far does the sled land from the foot of the cliff? 3. The attempt at a solution Honestly, I have no idea how to go about this problem. I am sure that I am supposed to use some energy conservation method but I don't know where to start.