Text-book of general physics, for the use of colleges and scientific schools (1899)
Hastings, Charles Sheldon · Boston: Ginn & company · leaf 41
instant, re-ferred to axes pass-ing through thestarting point, be xand y. Then, sincethe only force act-ing on P is then downward force of weight, the motion parallel to the Faxis will be uniformlyaccelerated, but in the horizontal direction the motion willbe a uniform one. If the velocities in… … Fig. 17. PROJECTILE. 31 Eliminating t between (19) and (20), X2Q (2i) y = x tan a — 2u2 cos2 a which, being an equation of the second degree, shows thatthe path of the body, or the trajectory as it is called, is aconic section, and, since it has but one infinite branch, itmust be a parabola. The…
Physics
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