Answer :
Final answer:
Speeding up or slowing down the back wheel of a motorcycle while in the air helps to control the landing and trajectory of the jump.
Explanation:
The back wheel of a motorcycle can be sped up or slowed down while in the air to help control the landing. By speeding up the back wheel, the rider can increase the rotation of the wheel and generate more lift, which can help in landing safely on a higher ramp. On the other hand, slowing down the back wheel can reduce the rotation and lift, allowing the rider to land on a lower ramp or control the trajectory of the jump.
