Tractive effort is required to_____________?
Correct answer: D. do all of the above
- A. overcome the gravity component of train mass
- B. overcome friction, windage and curve resistance
- C. accelerate the train mass
- D. do all of the above
Explanation
Tractive effort must overcome the train’s gravity component, running resistances such as friction, windage and curves, and the additional force needed for acceleration. Therefore, all three listed requirements apply.
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