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Rolling drag is the resistance that occurs when a car's wheels are in contact with the road. This can be caused by factors such as friction between the tires and the road surface. Air drag is the resistance that occurs when a car moves through the air, caused by the air pushing against the car's body.
Rolling drag and air drag both act as opposing forces to a car's motion, slowing it down as it coasts. The amount of drag depends on factors such as the speed of the car, the surface of the road, and the shape of the car's body.
Yes, there are ways to reduce both rolling drag and air drag. Rolling drag can be reduced by using tires with less rolling resistance and keeping them properly inflated. Air drag can be decreased by designing cars with sleek and aerodynamic shapes, and by using materials that reduce air resistance.
A heavier car will experience more rolling drag due to the increased force needed to overcome friction between the tires and the road. However, a heavier car may also be more stable and have less air drag due to its weight pressing down on the tires, making it less affected by air resistance.
While these forces can slow down a car's coasting, they also help to improve control and stability. Rolling drag can provide better traction and handling, while air drag can provide downforce to keep a car grounded at high speeds. Additionally, these forces can help to slow down a car in a controlled manner, making it easier to come to a stop.