Golf-catapult physics experiment

thingiverse

I built this catapult for my final examination-project during high school with my former classmates. Our goal was to compare the theoretical physics we learned in class to real-world physics. Additional parts required: * 100mm long 8mm diameter steel rod (available on eBay or similar) * A pair of skateboard bearings The catapult itself is printed in PLA (white) and Colorfabb-XT (grey) for the more stressed parts. The intended projectile is a golf ball, and the "slider" supports a resolution of 0.5 degrees. The steps are 1 degree, but since the "stop" extrudes slightly at one end, 0.5 degrees resolution can be achieved by adjusting it. For a weight, we used a 1kg iron weight, though I provided a hole for attaching smaller weights that hang freely. We also tried using a 2kg weight, which required the repair parts. I assembled mine using superglue, lots of it! Don't forget to print the "-x2" parts twice! For our full report, written in Swedish (sorry), click this link: https://drive.google.com/open?id=1bjw_SEWblg5SLXinC_dhb7eLj7-2LXS0XFZlZMK-11k If you build one or have any questions, please let me know!