1. The problem statement, all variables and given/known data Find the Linear momentum of an unwinding Cylinder with one end of a string attached to the ceiling. The mass of the cylinder is m and radius r. The cylinder is uniform and there is no slipping. 2. Relevant equations Momentum, P = mv moment of inertia , I = 1/2 MR^2 3. The attempt at a solution distance from ceiling to point on cylinder , y = l(length of string unwound) so is the momentum simply m*dl(t)/dt?