1. The problem statement, all variables and given/known data http://img172.imageshack.us/img172/5227/4rj8.jpg [Broken] 2. Relevant equations Not sure, but I think KE=.5mv2 and PE=mgh are two possibly useful equations for this problem. 3. The attempt at a solution I have no idea how to even start this problem. I've been searching the internet for hours and I seriously need help. Step by step instructions on how to do this are really really appriciated.