Kinematic quantities of projectile motion[edit]
In projectile motion, the horizontal motion and the vertical motion are independent of each other; that is, neither motion affects the other.
Acceleration[edit]
Since there is no acceleration in the horizontal direction, the velocity in the horizontal direction is constant, being equal to . The vertical motion of the projectile is the motion of a particle during its free fall. Here the acceleration is constant, being equal to .[1] The components of the acceleration are:
,
.
Velocity[edit]
The horizontal component of the velocity of the object remains unchanged throughout the motion. The vertical component of the velocity increases linearly, because the acceleration due to gravity is constant. The accelerations in the and directions can be integrated to solve for the components of velocity at any time , as follows:
,
.
The magnitude of the velocity (under the Pythagorean theorem):
.
Displacement[edit]
Displacement and coordinates of parabolic throwing
At any time , the projectile's horizontal and vertical displacement:
,
.
The magnitude of the displacement:
.