Starting from a speed of approximately 60 km/h, what becomes the primary resistance force that the vehicle must overcome to move forward?

Question

DentroTest · Accepted Answer

The correct answer is air resistance or aerodynamic drag. While rolling resistance (tire friction) dominates at low speeds, aerodynamic resistance increases in proportion to the square of the speed. This means that once you exceed 60-80 km/h, the effort the engine must make to 'push' through the air is greater than that needed to turn the wheels or overcome gravity on flat ground, making it a key factor in increased fuel consumption on highways.

Starting from a speed of approximately 60 km/h, what becomes the primary resistance force that the vehicle must overcome to move forward?

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