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Saturday, September 26, 2009

Shopping Cart Stops on a Travelator

The question: What makes the shopping cart stop once it gets on the travelator?
Fact #1 : The wheels (made of two discs and fixed on both ends of the shaft) remain free to rotate on the travelator!
Fact #2 : The shaft in between the wheels do not move.
Go to the nearest shopping centre with a travelator. Grab a shopping cart, go straight to the travelator, and then figure it out.
Have fun unlocking the mystery!

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