Does the periodicity of the variation match the rotation period? I used to do the lab this way and the periodic impulse the students applied to keep the weight rotating showed up this way. Highlighting the good part and calculating the mean might reduce the effect of this.

I tried adjusting the black nut after seeing your reply. It seems to be glued in place.

I have enough OEM hooks for now. I'll save the long ones and try to adjust them if my supply continues to dwindle.

Students have misplaced hooks and i replaced them with some older ones with a longer threaded hook and the probe quit working. Go back to the short one and it’s fine.

It's hidden behind a button labeled "Compose" in the "Upload Recommendation Letter" section.

I always mentioned OpenStax when I was an AP physics consultant. They've customized it for Physics 1 & 2 too. Maybe it's lack of marketing or worries about crappy bandwidth in the kids' homes?

BTW, I was wrong. There is a HS physics book from OpenStax now.

OpenStax only has college-level physics texts. Is there an open-source, on-level physics text out there? Printed texts are now prohibitively expensive for many schools.

It's used in flow meters and borehole monitoring in the petroleum industry and Indonesia has some of that.

Is Indonesia downwind from the islands where the French tested their nukes?

Thanks for the idea Bree! My classes are doing this on Thursday

I still have a glass urine specimen flask I bought from them 40 years ago. I used it to hold pencils on my desk for years.

it's a nice related rates problem to ask the kids what change in height from the surface is required to get a 1% reduction in the weight of an object

I second the high data rate. I often sample collisions at 1 kHz. Also, dig into the settings and learn how to start acquisition based on the force sensor reading and collect pre-trigger points if you don't already know how. The bounce will be so quick that manually triggering will be a challenge.

They're made to crash into each other so I doubt if this would be a problem. Pasco used to sell a kit that would convert one of their older wired force sensors into a lab balance. It came with a disk that screwed into the sensor and a jig to hold it vertical.

In physics, we were thrown into the classroom w/o any guidance and just expected to learn from our mistakes. My training in grad school consisted of a copy of the lab manual and keys to the planetarium. Some of my younger humanities colleagues did get pedagogy courses.