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Projectile Motion When a body moves under an arch whose direction is always parallel to the initial direction of the body, the magnitude of the body's velocity changes over time, but the direction remains the same, so the motion of the body is in a reserve. This type of motion is called State Line motion. For example, when we look at a non-upward direction and fall down, under the gravitational acceleration, it moves in linear the direction of upward. But when one moves under an arch whose direction is different from the initial velocity direction of the body, both the magnitude and direction of the body's velocity change with time, so the body progresses in a plane curve such that Speed ​​is called plane motion. The simplest simple example of flat motion is projectile motion when a body is thrown at an initial velocity and the door in a direction different from each direction, then the gravitational acceleration that takes place in the vertical direction under the vertical pla...