1. : a body projected by external force and continuing in motion by its own inertia. especially : a missile for a weapon (such as a firearm) 2. : a self-propelling weapon (such as a rocket)

Summary Identify and explain the properties of a projectile, such as acceleration due to gravity, range, maximum height, and trajectory. Determine the location and velocity of a projectile at different points in its trajectory. Apply the principle of independence of motion to solve projectile motion problems.