1. The problem statement, all variables and given/known data 2. Relevant equations ƩF = ma 3. The attempt at a solution I know how to break this problem up into the x and y direction Y Direction: Ft cosθ - Fg = 0 X Direction: Ft sinθ - Fg = mv2 / r The hint says to find the inward radial component. I'm guessing this means to find r, because I think that is the only thing missing for me to solve this. To find r I think I would use some combination of the length of the string and theta, but don't exactly know. Thanks for any help!