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Motor Vehicles Obey Newton's Laws of Motion

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Newton's Third Law of Motion states that for every action, there is a equal and opposite reaction. This law explains why your car moves forward instead of the road moving backward when you step on the accelerator. The force exerted by the tires on the road is matched by an equal and opposite force exerted by the road on the tires. If that force is enough to overcome the car's inertia, e.g., on a clean, dry road, the car accelerates forward. If it is not, e.g., if the car is stuck in ice or snow, the car does not accelerate forward. Early Auto Engines