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 39
RESULTANT MOTION. 33 … the forces, and will itself represent the resultant of theseforces. Let a, Fig. 13, be a billiard ball, for instance, struckby two unequal forces in the directions 6, c, and d^ e ; the ball,instead of following the direction of either, will move in thediagonal a, f, between the forces.* Pig. 14-…
Physics
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