Hale, Joseph W. L. (Joseph Woodwell Ledwidge), 1886- · New York [etc.] McGraw-Hill book company · leaf 55
28. In using an ordinary claw hammer for pulling a nail as shownin Fig. 53, we are using a first-class lever. Suppose as shown 40 MECHANICS AND ALLIED SUBJECTS … rum Fig. 54.
Mechanics, Applied
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