A freight train consists of two 8.3 • 10^4 kg engines and 45 cars with average masses of 5.75 • 10^4 kg each.
m = 8.3 • 104 kg
m2 = 5.75 • 10^4 kg
f = 7.3 • 10^5 N
What is the force in the coupling between the 37th and 38th cars (this is the force each exerts on the other), assuming all cars have the same mass and that friction is evenly distributed among all of the cars and engines?

Question

A freight train consists of two 8.3 • 10^4 kg engines and 45 cars with average masses of 5.75 • 10^4 kg each.
m = 8.3 • 104 kg 
m2 = 5.75 • 10^4 kg
f = 7.3 • 10^5 N
What is the force in the coupling between the 37th and 38th cars (this is the force each exerts on the other), assuming all cars have the same mass and that friction is evenly distributed among all of the cars and engines?