Final answer:
The force that accelerates a car on a level road is exerted by the road on the tires due to friction, following Newton's laws of motion.
Explanation:
The force that accelerates a car on a level road is exerted by the road on the tires. When the tires attempt to rotate, they push against the ground via friction, and the ground pushes back, causing the car to accelerate.
Friction
plays a crucial role in providing the horizontal force needed for acceleration, as per Newton's laws of motion. The external object exerting this force is the road.
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