1. 2. On a horizontal road, a small sedan is pulling a large station wagon that has run out of gas. While the sedan is speeding up to high way speeds. A. The sedan pulls harder on the station wagon than the station wagon pulls on the sedan; otherwise there would be no acceleration. B. The station wagon pulls just as hard on the sedan as the sedan pulls on the station wagon, no matter what the acceleration is. C. It is not possible to know which car pulls harder on the other without knowing their masses. 2. Relevant equations Newton's third law. 3. The attempt at a solution I chose B, due to Newton's third law, and action-reaction pairs. The sedan pulls harder on the rope (if there is one) than the state wagon pulls on the rope. That's how you get forward acceleration, right?