A projectile is any object moving freely under gravity in two dimensions

Projectile Motion — AQA A-Level Physics

Key Definition

Projectile — A particle moving freely (unpowered) under gravity in a two-dimensional plane.

Examples: a thrown ball, a diver jumping from a board, a cannonball after firing.
The trajectory is a parabola (ignoring air resistanceThe opposition to currentThe rate of flow of chargeA property of matter that causes it to experience a force in an electromagnetic field. Measured in coulombs (C).. Measured in amperes (A). flow. The ratio of potential difference to currentThe rate of flow of chargeA property of matter that causes it to experience a force in an electromagnetic field. Measured in coulombs (C).. Measured in amperes (A).. Measured in ohms (Ω).).
Key quantities: time of flight (total time in air), maximum height (when vertical velocityThe rate of change of displacement. A vector quantity. Measured in m s⁻¹. = 0), range (total horizontal distance).