1. The problem statement, all variables and given/known data A 100g bead is free to slide along an 80cm long piece of string ABC. The ends of the string are attached to a vertical pole at A and C, which are 40 cm apart. When the pole is rotated about its axis, AB becomes horizontal. Find the tension in the string. Find the speed of the bead at B. 2. Relevant equations a=v^2/r F=ma 3. The attempt at a solution So I figured out that the radius of the the circular motion the bead makes is 30cm. However, that's all I have. I'm not sure where to go from here because I don't know the velocity or acceleration.