Question

40000kg engine pulls a train of 5 wagons,each of 2000kg,along a horizontal track. If the engine exerts a force of 40000N & the track offers a friction force of 5000N,then calculate:​

Answer 1

(a) The net accelerating force = Force exerted by the engine - friction force=

40000 N - 5000 N= 35000 N

(b) The acceleration of the train (a) = ?F = 35000 N

Mass of 5 wagons pulled by engine = 5 x 2000= 10000 kg

∴ F = ma35000 = 10000 x a

∴ a = 3500010000 = 3.5 m/s2

(c) The force of wagon 1 on wagon 2 2s.pngF = ?Mass of wagon -> (2000 x 4)a = 3.5 m//s2F

= ma= 8000 x 3.5

= 28000 N