This tag is for questions relating to projectile, object moving through space due to the exertion of a force. The path of a projectile is called its trajectory.
A projectile is an object upon which the only force is gravity. Gravity acts to influence the vertical motion of the projectile, thus causing a vertical acceleration. The horizontal motion of the projectile is the result of the tendency of any object in motion to remain in motion at constant velocity. Due to the absence of horizontal forces, a projectile remains in motion with a constant horizontal velocity. Horizontal forces are not required to keep a projectile moving horizontally. The only force acting upon a projectile is gravity.
Projectile can also be defined as an object launched into the space and allowed to move free under the influence of gravity and air resistance. Although any object in motion through space (for example a thrown baseball, kicked football, fired bullet, thrown arrow, stone released from catapult) may be called projectiles, they are commonly found in warfare and sports. Mathematical equations of motion are used to analyze projectile trajectories.
For more about this see:
https://en.wikipedia.org/wiki/Projectile
https://en.wikipedia.org/wiki/Projectile_motion
https://www.physicsclassroom.com/class/vectors/Lesson-2/What-is-a-Projectile
