On downgrades, why does a vehicle's speed tend to increase?

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Multiple Choice

On downgrades, why does a vehicle's speed tend to increase?

Explanation:
On a downgrade, gravity provides a downhill push that acts along the road. This component of gravitational force pulls the vehicle forward and converts potential energy into kinetic energy, causing acceleration. As speed increases, resisting forces such as aerodynamic drag and rolling friction rise, eventually balancing the downhill pull at a terminal speed. That balance is why you often see speed climb when going downhill until those forces catch up.

On a downgrade, gravity provides a downhill push that acts along the road. This component of gravitational force pulls the vehicle forward and converts potential energy into kinetic energy, causing acceleration. As speed increases, resisting forces such as aerodynamic drag and rolling friction rise, eventually balancing the downhill pull at a terminal speed. That balance is why you often see speed climb when going downhill until those forces catch up.

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