ClipArt ETC
"The lever of the first class has the fulcrum between the power and the weight." Examples: a common crowbar, a pump handle, scissors, a seesaw. -Foster, 1921

First Class Lever

"The lever of the first class has the fulcrum between the power and the weight." Examples: a common…

"The lever of the second class has the weight between the power and the fulcrum." Examples: a nutcracker, a wheelbarrow. -Foster, 1921

Second Class Lever

"The lever of the second class has the weight between the power and the fulcrum." Examples: a nutcracker,…

"The lever of the third class has the power between the weight and the fulcrum." Examples: sewing machine treadle, forearm. -Foster, 1921

Third Class Lever

"The lever of the third class has the power between the weight and the fulcrum." Examples: sewing machine…