A unicycle has only a single wheel and its rider sits above that wheel, pedaling furiously to stay upright. When shshe is traveling straight forward at a steady pace, she can maintain stability by always doing what?

To maintain stability while riding a unicycle, the rider needs to constantly make small adjustments by turning the wheel in the direction of their falling to regain balance. This constant adjustment is called "countersteering." When the rider leans slightly to one side, the unicycle starts to fall in that direction. To counteract the fall, the rider turns the front wheel slightly in the direction of the fall, which creates a torque that helps bring the unicycle back under the rider's center of gravity. This process is done continuously to maintain stability and avoid falling off the unicycle.