(b) Compute the steepest gradient that a train of 20 wagons and a locomotive can negotiate given the following data: Weight of each wagon 20 t , weight of locomotive 150 t , tractive effort of locomotive 15 t , rolling resistance of locomotive $3 \mathrm{~kg} / \mathrm{t}$, rolling resistance of wagon $2.5 \mathrm{~kg} / \mathrm{t}$, speed of the train is 60 kmph .
Explanation
The formula used to determine the steepest gradient is based on the principle of limiting the acceleration of the train. The steepest gradient is determined by the ratio of the tractive effort to the total weight of the train.
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