Hale, Joseph W. L. (Joseph Woodwell Ledwidge), 1886- · New York [etc.] McGraw-Hill book company · leaf 54
.^^^f^^^a Fig. 51. ^ W? 18 M fc 2D/am Fig. 52. … 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
Mechanics, Applied
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