Select values for speed, angle and drag. Click the draw button, the trajectory will be drawn for you. Range, flight time and maximum height are also calculated and displayed. If you choose drag value to be zero, an ideal trajectory will be drawn (Model 1). You may want to explore the effects of initial velocity and angle of projection over range, flight time and maximum height reached by the projectile.
A non zero value for drag will give a trajectory of a projectile of Model 2. Compare the values of range, flight time and maximum height to those of an ideal projectile.