I would appreciate some help on this question involving a cylinder rolling down a slope; I'm far from comfortable with the physics involved. Question here: This is my free-body diagram of the forces acting on the cylinder: Expressions for the acceleration in the x- and y-directions in terms of the forces acting on the cylinder: Now I think the above is okay. The following is where I get a bit lost... Expression for the angular acceleration: Acceleration along x (didn't it already ask for this..?) : I really have no clue if the above is even remotely correct. I'm very fuzzy on the physics at the moment, so if someone could take the time to explain it to me I would be immensely grateful. Thanks!