Suppose you have an object (lets call it block A) resting on the edge of a circular rotating disk and sitting static on the disk. I'd like to visualize a free body diagram for this showing forces. These are the forces I believe are acting on it: - Fg - Force due to gravity - Fn - Normal force equal in magnitude to Fg but it the opposite direction - Fc - Centripital force towards the center of the disk - Ffs - Force of static friction equal equal in magnitude to Fc in the direction that is tangent to the disk and in the same direction as the rotation of the disk. Is this correct? I'm also trying to understand why Fc and Ffs would be equal in magnitude as I saw in an example. Any help would be appreciated.