1. The problem statement, all variables and given/known data A light string can support a stationary hanging load of 27.0 kg before breaking. An object of mass m = 2.81 kg attached to the string rotates on a frictionless, horizontal table in a circle of radius r = 0.809 m, and the other end of the string is held fixed as in the figure below. What range of speeds can the object have before the string breaks? 2. Relevant equations ƩF=ma ac=v2/r 3. The attempt at a solution The light string can suppport a stationary hanging load of 27.0 kg before breaking. Object's mass = 2.81 kg r = 0.809 m What range of speeds can the object have before the string breaks? Substitute the formula for centripetal acceleration into Newton's second law and you get: ƩF = m v2/r Then you plug in the known values into the equation, and you get: ƩF = (2.81)v2/(0.809). How would you calculate force in this case?