Some of the main physics principles that applied to our paper trebuchet would be the weight of the projectile and the velocity that the projectile leaves the pouch at. The higher the velocity and the lower the weight (to a point) the father it will fly.
There are also many environmental and performance factors that influence how well our trebuchet will perform. The environmental factors were greatly minimized on our this trebuchet compared to how it will be on the next one because this one is inside. The performance factors though that we mainly worked with would be counter weight, angle of release and length of sling. We adjusted the weight in order to give the projectile more or less velocity. We used the angle of release to find our most efficient angle which is 45 degrees. The length of sling affected how the sling let go of the projectile so that we could launch it better.