That is because the point where it is applied—the point of the tire that is momentarily in contact with the road—is also momentarily at rest relative to the road: it is, precisely, not slipping (This ...That is because the point where it is applied—the point of the tire that is momentarily in contact with the road—is also momentarily at rest relative to the road: it is, precisely, not slipping (This in fact means the kind of friction here is static friction), so Δx in the equation W=FΔx is zero.
That is because the point where it is applied—the point of the tire that is momentarily in contact with the road—is also momentarily at rest relative to the road: it is, precisely, not slipping (This ...That is because the point where it is applied—the point of the tire that is momentarily in contact with the road—is also momentarily at rest relative to the road: it is, precisely, not slipping (This in fact means the kind of friction here is static friction), so Δx in the equation W=FΔx is zero.
