8000 kg engine pulls a train of 6 wagons,each of 2000 kg ,along a horizontal track.If the engine exerts a force of 40000 N and track offers a frictional force of 4000N,then calculate the acceleration of the train.
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Force = 40000-4000
force = 36000N
Mass = 8000+6×2000
=8000+12000=20000
a= f/m
a = 36000/20000
a= 3.6m/s^2
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