Introduction

In this event, the hula hoop is thrown upward at an angle with a backspin. At first, the hula hoop's motion is that of a bouncing ball, though its angular velocity and horizontal velocity get slowed whenever it contacts the ground due to the friction generated by the hula hoop spinning against the ground. It also bounces less and less high as the hula hoop's kinetic and potential energy is lost due to friction. At some point, the hula hoop has slowed down enough and is contacting the floor. The hula hoop then switches to the motion of a wheel and continues to spin counterclockwise back to the thrower.

Video