Discussion

Is this topic even worth teaching anymore?

mechanical advantage, ho hum

M.A. =  Feffort
Fload

velocity ratio, hum ho.

V.R. =  vload
veffort

efficiency, Well, I like this part.

η =  Wout
Win

except for the stupid eta symbol.

The human body is exceptionally efficient at extracting energy from food. Feces retain only about 5% of the chemical energy originally present in the food consumed.

Whad'ya think of that?