Find the energy conversion efficiency of a 2000. lbf thoroughbred racehorse with a 120. lbf jockey and tack running 1.25 miles on a flat track in 144 s. The horse accelerates to a constant speed at the starting gate and maintains this speed throughout the race.
During the race, the horse expends energy at the rate of 33,000. Btu/h. Ignore any aerodynamic effects.