Educational Force Sensor + Lab Exercises

3D printers are becoming more prevalent in schools these days, but what kinds of education specific things can they be used for? Why not an introductory lesson in physics?!!

This is a functioning 3D printed load cell model capable of measuring force in tension and compression. You can change out the spring to measure forces up to 20 lbs! Links to the purchased parts and lessons explaining the science behind it are all provided in this Thingiverse post!

This hands-on project is safe for kids and the result is durable and can be used for future educational experiments!

Video Demo Here:
https://www.youtube.com/watch?v=wAwtl4TtXP8

**Update: Links to the non-printed parts for quick reference here:**
**Hardware:**
(1) Spring (Spring-rate = 5.1 lb/in): http://www.mcmaster.com/#9657K428
(1) Alternate Spring (Rate = 3.77 lb/in): http://www.mcmaster.com/#9657K115
(1) Alternate Spring (Rate = 10 lb/in): http://www.mcmaster.com/#9657K429
(1) Sliding Potentiometer (2.36 inch trav