The elements of natural philosophy : copiously illustrated by familiar experiments and containing descriptions of instruments, with directions for using : designed for the use of schools and academies (1856)
Sprague, A. W. (Alfred White), 1821-1891 · Boston : Phillips, Sampson & Company · leaf 35
all dropped from an elevation sufficiently great, mayacquire a velocity and force far greater than if fired from a rifleor cannon. 18. Motion of Projectiles. — When a body is thrown in a di-rection oblique to the perpendicular, it is acted on by two forces, * This small AYeight is not sliown in the… … the projectile force, which tends to impel it forward in a straightline, and the force of gravity, which acts to bring it to the earth. Instead, therefore, of fol-lowing the direction of eith-er, the body describes acurve between the twoforces. This may be illus-trated by Fig. 8. Let anybody, as a…
Physics
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
