question_answer 7)

A 8000 kg engine pulls a train of 5 wagons, each of 2000 kg, along a horizontal track. If the engine exerts a force of 40000 N and the track offers a friction force of 5000 N, then calculate (a) the net accelerating force; (b) the acceleration of the train; and (c) the force of wagon 1 on wagon 2  

Answer:

(a) Net accelerating force = Force exerted by engine - Frictional force = 40000 - 5000 = 35000 N. (b) Acceleration,     (c) Force of wagon 1 on wagon