1. The problem statement, all variables and given/known data A tetherball goes around the pole at a constant velocity. The rope has a 2m length, makes a 30 degree angle below the horizon and the ball's mass is .5 kg. 2. Relevant equations F(gravity)=m*a F(centripetal)=mv^2/r 3. The attempt at a solution I'm stuck at trying to find centripetal force.