1. The problem statement, all variables and given/known data A pendulum consists of a mass on a 50 cm long string. It is being held stationary at a 30°angle with the vertical. After release, how fast will it be going at the bottom? (Hint: Use trigonometry to find how high the ball is initally) 2. Relevant equations Ek = 1/2mv^2 for sure to find the velocity Eg = mgh 3. The attempt at a solution I'm basically brain-dead on this question, I don't know where to start.