Projectile Motion (Galileo and Newton) Documents
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The EJS Projectile Motion (Galileo and Newton) Model presents two different views of projectile motion. The first view, associated with Galileo, describes projectile motion as a combination of horizontal motion with a constant velocity, equal to the projectile initial horizontal velocity component, and vertical motion with constant acceleration and an initial velocity equal to the projectile's initial vertical velocity component. The second view, described by Newton in his Principia, presents projectile motion as a combination of inertial motion, with constant velocity equal to the projectile's initial velocity, and motion produced by a constant downward acceleration starting from rest. These two views are mathematically equivalent, but each view emphasizes different aspects of the motion.
Published July 3, 2012
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