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projectile motion
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Two graphs compare projectile motion. Panel A shows a parabolic path starting high on the Z axis and curving downward to the X axis. Panel B shows a parabolic path starting at the origin, rising upward, then curving back down to the X axis, illustrating an initial upward velocity.
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Italian physicist Guglielmo Marconi at work in the wireless room of his yacht Electra, c. 1920.
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projectile motion

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Two graphs compare projectile motion. Panel A shows a parabolic path starting high on the Z axis and curving downward to the X axis. Panel B shows a parabolic path starting at the origin, rising upward, then curving back down to the X axis, illustrating an initial upward velocity.
path of projectile Figure 5: (A) The parabolic path of a projectile. (B) The parabolic path of a projectile with an initial upward component of velocity.

Projectile motion describes the path of an object launched into the air, influenced only by Earth's gravity. Galileo famously observed that this path is a parabola. This motion can be understood as two independent movements: constant horizontal motion and vertical motion governed by gravity, similar to a freely falling body.1

While air resistance and wind are often neglected in basic physics explanations, they significantly affect real-world trajectories. Ballistics is the science that studies the propulsion, flight, and impact of projectiles, considering forces like gravity, drag, and lift. The trajectory of a projectile is its path through space, and under ideal conditions (no air resistance), it forms a parabola.12

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2 Britannica Sources
  1. mechanics - Projectile motion
  2. ballistics

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