The equations postulated by Newton according to his three laws of motion are applicable in projectile motion. These are: "S = Vit + 1/2at2," "Vf = Vi + at" and "2aS = Vf2 - Vi2," where "S" is the distance covered, "Vf" is the final velocity, "Vi" is the initial velocity, "t" is time, and "a" is acceleration. In this motion, acceleration (a) can be replaced by gravity (g).
In projectile motion, there are two components of velocity: Vx = Vcosø and Vy = Vsinø.
When a ball is thrown horizontally, it moves parallel to the ground due to the force exerted on it. Due to gravitational force exerted on the ball, the ball comes to the ground. The velocity with which the ball is thrown by a person is the initial velocity. The velocity with which the ball hits the ground is the final velocity.
Acceleration is the force of gravity that is equal to 9.8 meters/second squared. "T" is the time taken by the ball to hit the ground from the moment it is thrown. "S" is the horizontal distance covered by the ball from the point where the person throwing is standing to the point where it hits the ground. Displacement, "S" in the above equations, is also of two types: horizontal and vertical.