Henderson, C. Hanford (Charles Hanford), 1861-1941, Woodhull, John F. (John Francis), 1857-1941 · New York, D. Appleton and company · leaf 100
inclined plane and the wheel and axle. Thescrew thread is simply an inclined plane wrapped around acylindrical support. The pitch of the screw—that is, the ver-tical distance be-tween two neigh-boring threads—isthe height of theplane. The threadcorresponding toone complete turnis the slant lengthof… … Fig. 42.—Screw. 84 PHYSICS screw by means of the principle of virtual velocities. Thusthe force, p, moves through the circumference of a circle,whose radius, r, is the radius of the wheel, while the weight,wy advances a distance equal to the pitch of the screw. ws = pd.iv X pitch = p X 2 irr. ~…
Physics
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