Originally Posted by
PeteHski
Coming back to this. Riding at 100 mph against the same relative headwind force takes exactly twice as much power, because Power = Force x Velocity and in this case 100 mph is twice as fast as 50 mph. There is no mistake in the calculator.
That may very well be how bikecalculator calculated it, but Im still convinced its wrong. Applying the same argument to the U-boat example, power to maintain position (0mph on the map) would always come to 0W no matter what speed or direction of the current, because the way You figure velocity in "
Power = Force x Velocity" it would be zero, as long as the boat is not moving in relation to the map. That simply isnt true. V
is the relative velocity of the fluid, be it water or air.