1. The problem statement, all variables and given/known data What is the minimum speed that a glider must fly in order to make a perfect vertical circle in the air if the circle has a radius of 200.0 m? 2. Relevant equations Fc = mv2 / r V = 2(Pi)r / T 3. The attempt at a solution I have drawn the free body diagram and I think that the formula should be Fg = mv2 / r but I am confused why there is no mass given in the question. Is there a way that I can solve for the mass?