1. The problem statement, all variables and given/known data The device consists of two rotating disks, seperated by a distance of d = 0.879 m, and rotating with an angular speed of 96.1 rad/s. The bullet first passes through the left disk and then through the right disk. It is found that the angular displacement between the two bullet holes is θ = 0.161 rad. From these data, determine the speed of the bullet. Basically, I'm lost in this equation.