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Question 7 (a)
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;


Solution

(a) Force exerted by the engine, F = 40000 N
Frictional force offered by the track, Ff = 5000 N 
Net accelerating force, Fa=FFf  = 40000 − 5000 = 35000 N
Hence, the net accelerating force is 35000 N.

Physics

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