What is the traction force of a 4200 kW diesel locomotive at a speed of 90 km / h?

Let us express and calculate the traction force of the diesel locomotive from the power formula (the movement of the locomotive must be considered uniform, the speed is constant):

N = F * V, where N is the power of the locomotive (N = 4200 kW = 4200 * 10 ^ 3 W), F is the required traction force of the locomotive (N), V is the speed of the locomotive (V = 90 km / h = 90 * 1000 / 3600 m / s = 25 m / s).

F = N / V = 4200 * 10 ^ 3/25 = 168 * 10 ^ 3 H = 168 kN.

Answer: The traction force of the locomotive is 168 kN.