A Uniform pool ball mass 'm' and raidus 'r' begins at rest. It is given horizontal impulse J of fixed magnitude at a distance br above its center where -1<=B<=1. Coefficient of kinetic friction between ball and table is u. Assume both ball and table are rigid. Find an expression for the final speed in terms of J, m, and B The only relevant equations I can think of are the moment of inertia of a solid sphere is 2/5MR^2 and J, the impulse, is the change in momentum, mass x velocity. Here's an illustration http://img507.imageshack.us/img507/4885/80038899xn3.png [Broken] I began the problem by using torque, but I doubt they want it in terms of an angle. Any pointers to approach this? thanks.