A car is skidding to a stop on a level stretch of road. you may want to review ( pages 115 - 117) . part a identify the number of the action/reaction pairs of forces between the car and the road surface.
The number of the reaction / action pairs of forces between the car and the road surface is 2 pairs. The car and the road surface can have a total number of 2 reaction or action pairs. So the answer is basically 2 pairs.
