Hi guys, I have an extremely simple conceptual question. According to my textbook (in a problem), "if you start a coin rolling on a table with care, you can make it roll in a circle.... the coin leans inward, with its axis tilted." I ask: how is this possible? The center of mass of the coin undergoes circular motion, yet the only forces that will ever be on the coin is the weight and normal force, which can never point in the centripetal direction. Thus, where am I going wrong?