Question

an engine weight 10000 kg pulls 6wagons each 2000kg if engine exerts 50000N and if track exerts 5000N friction find acceleration of ​

Answer 1

Answer:

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Explanation:

Force of engine = 40000 N

Force of friction = 5000 N

Mass of engine = 8000 kg

Total weight of wagons = 5 x 2000 = 10,000 kg

a) Net accelerating force = Force exerted by engine - Force of friction = 40000 - 5000 = 35,000 N

b) Acceleration of the train can be found using F = ma

35000 = (mass of engine + mass of 5 wagons) x a

35000 = 18000a

a = (35000/18000) = 1.944 m/s2

Force of wagon 1 on wagon 2 = mass of 4 wagons x a

= (4 x 2000 x a) = (8000 x 1.944) = 15552 N