![]() 2 Kinematic quantities of projectile motion.βάλλειν (‘ba’llein’), “to throw”) is the science of mechanics that deals with the flight, behavior, and effects of projectiles, especially bullets, unguided bombs, rockets, or the like the science or art of designing and accelerating projectiles so as to achieve a desired performance. A ballistic missile is a missile only guided during the relatively brief initial powered phase of flight, and whose subsequent course is governed by the laws of classical mechanics.īallistics (gr. Taking other forces into account, such as friction from aerodynamic drag or internal propulsion such as in a rocket, requires additional analysis. ![]() ![]() Because of the object’s inertia, no external horizontal force is needed to maintain the horizontal velocity component of the object. The only force of significance that acts on the object is gravity, which acts downward, thus imparting to the object a downward acceleration. The study of such motions is called ballistics, and such a trajectory is a ballistic trajectory. This curved path was shown by Galileo to be a parabola. Projectile motion is a form of motion experienced by an object or particle (a projectile) that is thrown near the Earth’s surface and moves along a curved path under the action of gravity only (in particular, the effects of air resistance are assumed to be negligible). Components of initial velocity of parabolic throwing
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