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## Main Question or Discussion Point

I teach aerodynamics. One horsepower is 550 lbs moved one foot in one second.

My question is this. Does that assume that the 550 lbs is being lifted vertically against gravity? As opposed to moving, say, a 550 lb chunk of concrete across a floor.

And if so, does the gravity value of 32.2 ft per second per second effect the measurement when gravity changes?

Tex

My question is this. Does that assume that the 550 lbs is being lifted vertically against gravity? As opposed to moving, say, a 550 lb chunk of concrete across a floor.

And if so, does the gravity value of 32.2 ft per second per second effect the measurement when gravity changes?

Tex