This program draws the orbit of the projectile motion of a cannonball or a bullet, and simulates the projectile motion problem with adding the effects of the air friction in real time. Cannon fire and mortar fire is modeled in this program. In the program, the user is able to change parameter of motion. User is able to change; Starting angle, Starting velocity, and even the gravitational acceleration of the planet. Air Friction force effected by, the mass of the bullet, the cross-sectional are