1. The problem statement, all variables and given/known data A 670 gm rock is whirled on the end of a string 44 cm long which will break under a tension of 24 N. What is the highest speed the rock can be twirled before it breaks? 2. Relevant equations Centripital Acceleration = velocity ^2 / radius F=MA 3. The attempt at a solution F = M A 24 = .67 x (V^2 / R) 24= .67 x (v^2 / .44) 7.0752 = V^2 2.6599 = V What am I doing wrong?