1. The problem statement, all variables and given/known data A boy whirls a stone in a horizontal circle of radius 1.5 m and at a height of 2.0 m above level ground. The string breaks, and the stone flies off horizontally and strikes the ground after traveling a horizontal distance of 10 m. What is the magnitude of the centripetal acceleration of the stone during the circular motion? 2. Relevant equations T = (2*3.14*r) / v^2 Ac = v^2 / r 3. The attempt at a solution I am not even sure how to begin this problem. I do have the vertical and horizontal positions, but I do not know how to derive the velocity simply from the information given. What am I missing?