@inventionontt: Original Video Credit: IG/thrifter.therapy Suspended above five possible letter grades, the pendulum on this wooden “Teacher’s Grade Decider” swings back and forth before eventually settling over one choice. Its wandering path makes the selection appear random as the weight repeatedly changes direction across the board. Hidden magnets beneath the playing surface interact with the pendulum’s metal or magnetic weight as it moves. Combined with gravity, momentum, friction, and the pendulum’s changing position relative to the magnets, these forces produce a complex swinging pattern before the motion eventually dies away. The device turns basic pendulum motion and magnetic interaction into a novelty desk toy designed to make choosing a grade look far more mysterious than it really is. Rather than functioning as an actual grading tool, it uses simple physics to create an entertaining demonstration of seemingly unpredictable motion. No copyright infringement intended. Content is shared for educational purposes only. Full credit goes to the original creator. For any questions or copyright concerns, please dm or contact us via the email listed on our page. #shorts #Science #education #learn #invention

Invention

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Tuesday 22 September 2026 04:04:23 GMT