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# 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 and

Q 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 and

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The net accelerating force is given by :

Net accelerating force    =    Force by engine    -    Frictional force

$=\ 40000\ -\ 5000\ =\ 35000\ N$

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