Introductory course of natural philosophy for the use of schools and academies. Ed. from Ganot's popular physics. By William G. Peck (1869)
Ganot, Adolphe, 1804-1887, Peck, William Guy, 1820-1892 · New York A.S. Barnes · leaf 41
But-cracker, 38 POPULAR PHYSICS. The oars of a boat are levers of the second class. The end of theoar in the water is the fulcrum, the hand is the power, and the boat,or rather the resistance of the water which it has to overcome, is theresistance. The shears employed for cutting metals belong to… … Fis. 20. The bones of the animal frame are many of them levers of thisclass. Thus, in the bone of the forearm in man, the elbow joint isthe fulcrum, the muscle attached just below the joint is the power,and a weight to be raised is the resistance. Other Machines. 33. Besides the lever there are two…
Physics
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