Brechner, Claude H., 1887- [from old catalog] · Boston, New York [etc.] Allyn and Bacon · leaf 246
ineis always less than 100 per cent. In the case of a lever there is usually very little frictionand so the efficiency is usually from 95 per cent to 99.9 percent. 281. Applications of the Lever. — There are many appli-cations of the lever, but one that needs especial mention isthe balance used for… … Figure 248. — Ball Bearings ReduceFriction and Increase the Efficiency. 236 MACHINES
Physics
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
