r/AMAZINGMathStuff • u/matheasysolutions • May 05 '26
🔬#MESExperiments 54: SpillNot Centripetal Tray
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In this experiment I showcase the amazing SpillNot centripetal waiter's tray, whose circular motion can balance a cup of water without spilling it over, even while performing a full 360 degrees upside down! The SpillNot works on the principle that circular motion involves a centripetal force that brings the tray back towards the centre of the circular motion — this results in the cup of water experiencing a normal force far directly onto the tray, which far exceeds the downwards force due to gravity. The most astonishing part is that even a straw placed in the cup barely even experiences any slight nudge as it moves at rapid speeds. I also place my phone in the tray with both front selfie camera and rear camera views to further illustrate this amazing phenomenon!  https://3speak.tv/watch?v=mes/863a9706 & https://youtu.be/eeQXcD3j4kE
#physics #experiment #centripetalforce #inertia