1. The problem statement, all variables and given/known data A ball of mass 0.23 kg is attached securely to a string, then whirled at a constant speed in a vertical radius of 0.75 m. Calculate the minimum speed of the ball at the top of the path if it is to follow a complete circle. 2. Relevant equations F = mv(squared)/R 3. The attempt at a solution I first solved for Fc when the ball is at the top of the circle with F=mv(squared)/R - mg and it equals 1.7 N. I then rearranged the equation to solve for V using V = the square root of FR/m and got the answer 2.35 m/s. My sheet says the answer is 2.7, which is pretty close to what I got, but I may have done something wrong. Any thoughts?