Although I am not a physics teacher, I taught ESL, one of our major projects was on the Medieval. In science they had to conceive and build miniature catapults built out of popsicle sticks and elastics. They then have an interclass competition. To show them what is the optimum ballistic angle so their « rock » goes the farthest, I designed a catapult simulation where they enter the angle and then take practice shots. Of course even with the same angle there is a statistical spread and they have little flags to put to get the median of the shots.