Suppose that the mower shown is self-propelled; i.e., that the rear wheels cause the mower...

Suppose that the mower shown is self-propelled; i.e., that the rear wheels cause the mower to move forward due to the friction between them and the ground. If a person were to apply a purely horizontal force, would this force help or hinder the rear wheels’ contribution to the forward motion of the mower? That is, would the rear wheels slip less easily or more easily?

Note: Concept problems are about explanations, not computations.

Figure P7.5