High school teacher Bruce Yeany makes "mystery boxes" and challenges his students to figure out how they work. The one in this video hangs from the ceiling by a string. Another string protrudes from the bottom of the box. If you pull on the bottom string, the box rises. In the video you'll see how it works.
Here's how a high school teacher's "Mystery Box" works
Mystery box revealed- Wheel and axle // Homemade Science with Bruce Yeany
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