Consider the collisions between a car and a truck whose weight is much heavier than the car (M ≫ m). Friction is so small that it can be ignored.

Question

If they are both moving at the same speed when they collide, what best describes the size (or magnitude) of the forces between the car and the truck?

1. Not enough information is given to pick one of these answers.
2. None of these answers describes the situ- ation correctly.
3. The car exerts a greater amount of force on the truck than the truck exerts on the car.
4. Neither exerts a force on the other; the car gets smashed simply because it is in the way of the truck.
5. The truck exerts a greater amount of force on the car than the car exerts on the truck.
6. The truck exerts the same amount of force on the car as the car exerts on the truck.

Answer 1

6. The truck exerts the same amount of force on the car as the car exerts on the truck

simply because of newton's law an equal and opposite reaction force