This demonstration illustrates energy conservation in an object undergoing rotation, as well as centripetal force. The forces and energy types involved are (translational and rotational) kinetic energy, (gravitational) potential energy and centripetal and normal forces.
This demonstration illustrates forces and is a good way to show a counterintuitive (if not fully understood) phenomenon.
This demonstration illustrates projectile motion. Specifically, it describes how a projectile launched vertically with a certain horizontal velocity will keep said velocity and describe a parabola in its flight