I've been given this problem http://i.imgur.com/7XtYt.png and I had no idea of how to come up with an answer since it is a circular path. The only thing that occurred to me is find the initial height using the chord length formula for a circle and then treat that chord as the hypotenuse of a right triangle. After finding "the height" that way I can then use an energy conservation approach to get the velocity and I get 16.78 m/s. Is that a correct way of doing it?. Even if it is correct, not many people would remember the chord length formula so I doubt our professor intended for it to be solved that way. There has to be an easier way to do it.