Third Class Lever Small 320×128 Medium 640×255 Large 1024×408 Download TIFF Original 2400×957 | (130.4 KB) Description "The lever of the third class has the power between the weight and the fulcrum." Examples: sewing machine treadle, forearm. -Foster, 1921 Keywords arm muscles, forearm, fulcrum, lever diagram, power, simple machine, third class lever, weight Galleries Levers Source: Ellsworth D. Foster ed. The American Educator (vol. 5) (Chicago, IL: Ralph Durham Company, 1921)
