* Friction: This is the main force. It acts between the tires and the road, and between the moving parts of the car's engine and transmission.
* Air resistance: This force opposes the car's motion through the air. It becomes more significant at higher speeds.
* Braking force: When you apply the brakes, this force acts on the wheels to slow them down. This force is created by friction between the brake pads and the brake rotors or drums.
So, the answer depends on what specifically is stopping the car.
* If you're talking about the force that slows down a car when you take your foot off the gas pedal, it's mainly friction.
* If you're talking about the force that brings a car to a complete stop, it's the braking force.
Let me know if you'd like a more detailed explanation of any of these forces!
