If a car crashes into a wall, the wall feels the force of the car and the car feels the force of the wall. If the wall doesn’t move then the force acting on the

If a car crashes into a wall, the wall feels the force of the car and the car feels the force of the wall. If the wall doesn’t move then the force acting on the car is the same as the force of the car on the wall. If the wall is also moving towards the car then the force felt by the car is the sum of the reaction force it would have felt if the wall were stationary plus the force due to the wall trying to accelerate the car in the opposite direction. In the author’s example is says that 2 cars crashing into each other is the equivalent of two cars crashing into a wall, and it’s false.