This post is brought to you by a weekend of thinking about inductors.

In the aether model, the charge in the wires drags the aether fluid outside the wire, creating whirlpools in the space inside the coils. These whirlpools act like a flywheel. What a nice, albeit incorrect, way to think about it.

I think that makes sense to me. The metronome frequency will be consistent. The graph frequency is only as consistent as the spinners rhythm and technique, which I would expect some variation from swing to swing, and so it would be harder to get a single frequency value.

Your periodicity looks similar to what I've seen. The agreement between your first two numbers also looks about as accurate as I'd expect. What do you mean by the third value? I'm not following that one

(3) tugging the probe up and down, which would effectively change the radius of the circle

I like it! I can also imagine it adding error in three ways:
(1) jiggling the force probe side to side, which would make less of the tension parallel to the probe's axis
(2) shorter string, which again makes the string less parallel to the probe's axis

Tilting the ring perpendicular to the velocity vector is such a good addition to this practicum, both for learning and for it to be successful. Will be stealing (the next time I teach projectiles -- not doing so at my current school at the moment)

I'm not super active on LinkedIn, but I'd be interested. I just searched the group over there and requested to join!

That agreement between measured height and reported height is nice. There must be something to this physics thing, huh?

For you we'll say it was on Mars, g ≈ 3.7 N/kg

It's summer. That amount of effort is reserved for the school year

I'm surprised the velocity and position curves are so smooth, considering how noisy the acceleration graph is. I wonder if they do some smoothing when integrating?

If I'm computing with measurements, calculations from measurements, or numbers from problems that stand in for one of these, then I use = with sig fig rules. This truly is equality, as best we can measure it.

I use ≈ if I'm doing a back of the envelope calculation where I'm estimating input values.

How did you measure acceleration? Did you swing around an accelerometer?

The other benefit to these is that they work with both wired and wireless force probes

I don't know of one. I'm guessing they're expensive, in part, because they don't have other commercial applications