What effect does gravity have on a vehicle when driving downhill?

When a vehicle is driving downhill, gravity plays a significant role in its movement. Specifically, gravity pulls the vehicle downwards, which influences its acceleration. As a vehicle descends a slope, the force of gravity causes it to gain speed because it is being pulled towards the ground. This effect can be substantial, especially on steep inclines, as the gravitational force can overcome the vehicle's resistance to motion.

Understanding this force is crucial for drivers, as it affects how they control the vehicle. For example, drivers need to be more cautious in managing their speed and braking when descending a hill, since the pull of gravity can lead to increased acceleration. Thus, recognizing that gravity pulls the vehicle down helps in assessing the necessary driving adjustments to maintain safe control while navigating downhill.