Circular Motion in Physics

A body going round a circle at a steady speed is still accelerating, and that is the whole difficulty of this topic. The speed never changes but the direction does, so there is always an acceleration pointing at the centre, and something has to supply it. The blocks open with that demand on real situations, a conical pendulum, a banked bend, a car on a flat curve, then allow the speed itself to change so that a second acceleration appears along the tangent, and finish with the view from inside a frame that is itself accelerating, where the books seem to balance only once a pseudo force is added.