The Spinning Wheel and Revolving Seat
First, the participant sits on the revolving seat. Then gripping the steering wheel with one hand, he begins to turn the spinning wheel with the other. While the axes of the spinning wheel and the revolving seat are perpendicular, the participant and the revolving stage are motionless. However, as soon as you move the spinning wheel from the vertical position by turning the steering wheel, the seat begins to rotate. It will always turn in the opposite direction to the movement of the steering wheel and will continue to rotate until the spinning wheel is returned to its original, vertical position. This is because the revolving seat is attempting to maintain the original inertia. This effort to always maintain inertia is known as ‘the angular momentum conservation law’.