YP Projectiles - Version 1.1 YP Projectiles is a projectile motion simulator used in physics classes. To simulate a trajectory, the user chooses the initial velocity (magnitude and direction), the vertical displacement component and the gravitational acceleration. The software simulates the parabolic trajectory and writes its main characteristics: range, maximum height reached, etc.During the simulation, it is possible to display three vectors: acceleration, velocity and position, and four graphs: acceleration, velocity, position and energy versus time. Trajectories, numerical data and graphs can be printed, copied or saved as PICT files.