The effect of smoothness of road on the motion of car using a practical example.

The effect of the smoothness of the road is observed on the motion of the car. For example, when driving on a rough road, the grooves of a car's type come in contact with the uneven parts of the road. As a result, frictional force occurs. This makes it easier for the car to move on the road and the car can be easily stopped by pushing the brake. But if the road is smooth, the grooves of a car\s type doesn't properly come in contact with the road. As a result, the car may side while moving or stopping. This causes inconvenience.