A projectile is an object that is propelled by the application of an external force and then moves freely under the influence of gravity and air resistance.[1][2] Although any objects in motion through space are projectiles, they are commonly found in warfare and sports (for example, a thrown baseball, kicked football, fired bullet, shot arrow, stone released from catapult).[3][4]

A projectile being fired from an artillery piece

In ballistics mathematical equations of motion are used to analyze projectile trajectories through launch, flight, and impact.

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