A car is moving on a level road. If the driver turns off the engine of the car, the car’s speed decreases gradually and ultimately it comes to a stop. A student says that two forces act on the car which brings it to a stop. What could these forces be? Which of these two forces contributes more to slow down and stop the car?
These forces would be the air friction and the friction between the tires and the road which would tend to bring the car at rest. Frictional force would contribute more in stopping the car.

Question

A car is moving on a level road. If the driver turns off the engine of the car, the car’s speed decreases gradually and ultimately it comes to a stop. A student says that two forces act on the car which brings it to a stop. What could these forces be? Which of these two forces contributes more to slow down and stop the car?

These forces would be the air friction and the friction between the tires and the road which would tend to bring the car at rest. Frictional force would contribute more in stopping the car.

Philoid · Accepted Answer

These forces would be the air friction and the friction between the tires and the road which would tend to bring the car at rest. Frictional force would contribute more in stopping the car.