During my aerodynamics class today we were given some basic work and power equations as applied to an aircraft, but I got bored and applied them to CrossFit.
So how much horsepower does one repetition of Olympic snatch at 135lbs. from ground to overhead produce?
Work = Force (F) x Distance of displacement (s)
W = 135 lbs x 7 feet (avg. displacement from ground to overhead)
W= 945 ft.-lbs.
Power (P) = Work (W)/ Work done per unit of time (t)
P = 945 ft.-lbs. / 1.2 secs. (average time for one snatch repetition)
P = 787.5 ft.-lbs/sec
Horsepower conversion (using units of pounds, feet, and seconds)
One repetition of a snatch at 135lbs will produce 1.43 horsepower.
Pretty awesome…and nerdy.
Similarly, when I max out on power clean at 285lbs, I produce only 2.59 horsepower.