1. The problem statement, all variables and given/known data A bob weighing 0.06 kg hangs vertically at the end of a string 0.30m long. Find the force which when applied horizontally. will pull the bob 0.10m aside from it's initial position. 2. Relevant equations F = mg, F = ma 3. The attempt at a solution The solution in the book says: In the figure, F = ma, CA = 1.10 m; SO = SA = 0.30 m. SC = (SA2 - SC2)1/2 = 2√2 / 10 m As, mg/SC = F / CA = T/AS and then the value is calculated. I don't understand what is done after obtaining the value of SC.