Final answer:
When a motorcycle rider pulls back lightly on the right handlebar while driving at highway speed, the motorcycle tips to the left and produces a left turn. This is due to the principle of gyroscopic precession.This torque causes the front wheel to precess, or tilt, in the direction of the turn, resulting in a left turn.
Step-by-step explanation:
When a motorcycle rider pulls back lightly on the right handlebar while driving at highway speed, the motorcycle tips to the left and produces a left turn. This is due to the principle of gyroscopic precession. The spinning wheels of the motorcycle have angular momentum, and when the handlebar is turned, it exerts a torque on the front wheel. This torque causes the front wheel to precess, or tilt, in the direction of the turn, resulting in a left turn.