1. The problem statement, all variables and given/known data A 7.26 kg ball hangs from end of 2.5 m rope. The ball is pulled back until rope makes 45 degree angle with vertical. What is the gravitation potential energy? 2. Relevant equations ug=mgh 3. The attempt at a solution I thought I would just multiply mass times gravity times height, but the answer is 52 J. What do I do with the angle I'm given?