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 • 10^{4} kg m_{2} = 5.75 • 10^{4} kg f = 7.3 • 10^{5} N

What force must each engine exert backwards to accelerate the train 5.00 • 10^{–2} m/s^{2}