posted by Robert C
On vacation, your 1300 kg car pulls a 540 kg trailer away from a stop light with an acceleration of 1.80 m/s2.
What is the net force acting on the car?
I have determined:
1) the force acting on the car by the trailer is 972 N.
2) The force acting on the trailer by the car is 972 N.
3) And the force required to produce such an acceleration is 3312 N.
The net force on the car must be
Mcar * acceleration = 2340 N
The trailer exerts a backward force on the car, but that is equal to the additional force on the car's wheels that is need to accelerate them both together. Remember they are only asking for net force