Задача id10305

The freight train moves along a flat section of the road at a speed of 60 km/h, while the electric locomotive develops a useful power of 100 kW. At what speed (in km/h) must one climb along a section with a slope of 1 m over a 200 m path so that the developed power is 120 kW? The drag force is equal to 0.01 of the force of gravity of the composition.

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