Pendulum Bob Holder
thingiverse
Keep those pendulum strings untangled until your students need them next. Sized for 1" diameter pendulum bob. (2.54 cm diameter). It should work fine if scaled up or down for different size pendulum. This thing was made with Tinkercad. Edit it online https://www.tinkercad.com/things/6TpCL6jVGNL
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