Hale, Joseph W. L. (Joseph Woodwell Ledwidge), 1886- · New York [etc.] McGraw-Hill book company · leaf 183
Yf^IO-lb.ClFig. 129 I230 17. As per Fig. 129, find the force necessary at F to balance theweight of 10 lb. shown. … F[±2W^20Ik Fig. 130. 18. As shown in Fig. 130, find the force necessary at/^ to balancethe 20 lb. What class of lever is this one? 19. What weight in lb. at W (Fig. 131) is required to set thesafety valve so as to lift at 200 lb. per sq. in. pressure with a 2-in. diam. valve? 20. As per Fig. 132,…
Mechanics, Applied
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