Hey guys, I need help understanding why it is static friction that is involved in pure rolling motion? From what I remember in translational motion, when the maximum static friction force is overcome, then the given object/particle/body will start accelerating. Otherwise, the object/particle/body will just stay put right? Anyhow, how does static friction determine a rigid object under rolling motion to undergo a "pure rolling motion?" Wouldn't the static friction force slow down the object or doesn't it have to be overcome for the rigid object to start rotating about its center of mass? I just cannot seem to picture it in my head right now and if you could help explain this concept better, then I can progress in my understanding of "pure rolling motion." Thanks.