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How does the mechanics of a shopping cart wheel stop rolling when on an inclined moving walkway? Pls be detailed... Pictures are even better

I'm pretty curious about this stuff. I know that there's some kind of brake, magnet or special design (wiki)... But how does it work, there's no illustration. Pls give me some pictures or link so I can understand it thoroughly

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Serious? It stops rolling when one or more of the wheels are turned perpendicular to the incline. It stops the movement of the wheels because for them to move they would have to be able to flip over and over. When parallel with the incline they can just roll freely downhill as designed to do.

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No. The wheels I see here can't roll freely downhill because it'll make the buyers a hard time keeping the carts still on an inclined walkway. Instead whenever on the incline they're very hard to move. If I push hard, yes they can move a little at a time.
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