Projectile Motion (1) Introduction and Theory: Consider a projectile motion of a ball as shown in Fig. 1. At t = 0 the ball is released at the position (0, y0) with horizontal velocity vx. Figure 1. The system of coordinates for the projectile motion. Because of the influence of a constant gravitational acceleration in the Y direction, the x and y components of motion, according to Newton’s laws of motion, are governed by the following equations: x = vx* t / 1 /y = y0– ½ * g * t2/ 2 / where g = 9.81 m/sec2is the gravitational acceleration.
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