1. The problem statement, all variables and given/known data Two beads A and B move along a semicircular wire frame as shown in the figure as shown in figure. The beads are connected by an inelastic string which always remains tight. At an instant the speed of A is u, angle BAC is 45 degrees and angle BOC is 75 degrees, where O is the centre of semicircular arc. The speed of bead B at that instant is. 2. Relevant equations 3. The attempt at a solution I really have no idea on how to begin with this. How should i go on forming equations? Please point me in the right direction. Thanks!