The electric locomotive, when driving at a speed of 54 km / h, consumes power of 600 km / h, determine the traction force of the electric locomotive if its efficiency = 75%.
Task data: V (speed of the electric locomotive) = 54 km / h (15 m / s); Ns (power consumed by a moving electric locomotive) = 600 kW (600 * 10 ^ 3 W); η (efficiency of an electric locomotive) = 75% (0.75).
We express the traction force of the electric locomotive under consideration from the formula: η = Np / Ns = F * V / Ns, whence F = η * Ns / V.
Calculation: F = 0.75 * 600 * 10 ^ 3/15 = 30 * 10 ^ 3 N (30 kN).
Answer: The traction force of the diesel locomotive under consideration is 30 kN.
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