第2个回答 2020-05-07
Traction is calculated based on: P = FV, F = P / V, where P is the power of the engine, in watts (W); V is the speed at which the car moves at a constant speed, in meters per second (m / s); and F is traction. The unit is N. In the following description, f, F1, f2, F3, F3', F are used to indicate the magnitude of the resultant force, which is positive. The engine does not work while the car continues to drive forward when the air on its force f1 backward, the ground on the driven wheel of the horizontal force f2 backward, on the driving wheel of the horizontal force f3 backward.