What happens to the stacker when it makes a turn?

When a stacker makes a turn, the outer tire must cover a greater distance than the inner tire due to the curvature of the path being taken. As a result, the outer tire rotates faster than the inner tire to accommodate this difference in distance. This principle is similar to how vehicles operate: during a turn, the wheels on the outside travel a larger circumference compared to those on the inside.

This differentiation in wheel rotation is important for maintaining control and stability of the stacker while maneuvering. If both tires were to rotate at the same speed, it would create potential instability and difficulty in steering, as the inner tire would be unable to keep up with the outer tire's path. Thus, the correct answer reflects the necessary dynamics of turning in a vehicle, particularly in the context of a stacker forklift.