Answer to Question #890 in Mechanics | Relativity for John
Fcar - 1000 = 1000; Answer:
Fcar = 2000[N]
According to Newton's third law, when a first body exerts a force F1 on a second body, the second body simultaneously exerts a force F2 = −F1 on the first body. This means that F1 and F2 are equal in magnitude and opposite in direction.
So the force with which trailer pulls the car is -F<sub>car</sub>
the second part of the question wasn't answered (With what force does the trailer pull the car?)