Comments by "Terje Oseberg" (@terjeoseberg990) on "Лошадиная сила против крутящего момента - простое объяснение" video.

  1. Actually, acceleration is only related to torque. The formula for acceleration is F = MA or Force equals Mass times Acceleration, or A = F/M. Since the wheels are a fixed diameter, the number of pounds of force that the tire is exerting on the road is constant for a constant torque. Therefor, if we were somehow able to keep the torque of the engine constant at every RPM without switching gears, then the acceleration would remain constant at every speed for each gear. However, because the torque of an engine is not constant for every RPM, we are required to use a transmission to increase the torque at higher speeds relative to what you'd get if you didn't have a transmission. For maximum acceleration you need to maximize the torque at the wheels. Because horsepower is force x distance / time = torque x RPM, more horsepower at higher RPM can be converted to more torque at lower RPM which is exactly what the transmission does to maximize the torque at the wheels for a given speed.
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  2. Torque X RPM = Power What the transmission does is convert one torque value to another by changing the RPM. Physics dictates that the output power is equal to the input power minus the inefficiency of the transmission due to friction. Without friction, the power will remain constant regardless of the RPM or torque.
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