Hale, Joseph W. L. (Joseph Woodwell Ledwidge), 1886- · New York [etc.] McGraw-Hill book company · leaf 64
t F is one-half the weight lifted at 48 PULLEYS {BLOCK AND TACKLE) 49 Wy neglecting the effect of friction. This arrange-ment forms a lever of the second class and we have theweight W X radius of pulley = F X diameter ofpulley. Therefore to lift 100 lb. at W requires a forceof 50 lb. at F. Compare… … ///////////A F^ISO
Mechanics, Applied
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
