1. The problem statement, all variables and given/known data A ball of mass 1.21 kg is attached to a rotating shaft by two strings, putting the ball into circular motion. Tension on the upper string is 35N. (The length of the strings is 1.6m) a) draw a free body diagram for forces acting on the ball. b) determine the tension in the lower string c) determine the net force acting on the ball d) determine the speed of the ball 2. Relevant equations ac= v^2/r Fc=mac 3. The attempt at a solution My problem is with a) I always have a hard time doing free body diagrams and breaking down the x and y components. Once I get that I know how to solve for c) and d). Some direction would be much appreciated!