Question

A car towing a trailer accelerates up a hill. Which one of the following statements is true ?
1. The car exerts a smaller force on the trailer than the trailer exerts on the car
2. The car exerts the same force on the trailer as the trailer exerts on the car
3.The car exerts a greater force on the trailer than the trailer exerts on the car
4. The relationship between the force exerted by the car on the trailer and the force exerted by the trailer on the car depends on the acceleration of the trailer.

Answer 1

According to the third Newton’s law (for every action, there is an equal and opposite reaction), the car exerts the same force on the trailer as the trailer exerts on the car (and it’s no matter what the acceleration is). It cannot be explained. It’s law of nature. It’s the way nature is arranged.

Answer: 2).