Reimagine physics teaching

Move a concrete pillar

With this simple but very clever setup, they managed to measure the movement of the concrete wall just by pushing it with their hands ! Sensitivity is obtained using a laser pointer, and it works with any wall.

And a french version :

Useful links if you want to try it yourself and better understand :

MacIsaac, Daniel L., et Michael Nordstrand. « Demonstrating and Measuring the Flexure of a Masonry Wall ». The Physics Teacher 39, no 4 (avril 2001): 212‑14. 

Irene Marzoli, Jean-Michel Courty, Joël Chevrier and Nathalie Lidgi-Guigui made it