Apparent Suspension of Gravity

AI Thread Summary
The discussion centers on the stability of a box that appears to be barely supported on a shelf. Participants question whether friction alone is preventing the box from falling, despite its lightness. There is a suggestion that the smooth plastic covering may contribute to its stability, raising concerns about its potential to slide off. The need for a view of the top of the box is emphasized to better understand the situation. Overall, the conversation explores the mechanics of balance and friction in this scenario.
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Look carefully. Of course, the box isn't floating, but it's only barely supported.

Is there anything more than just the friction of the box against the shelf that's keeping it from falling? This was my first impression, but despite the lightness of the box I have the feeling I'm missing something. The box is pushing straight downward, and the plastic covering it is quite smooth, so shouldn't it slide off?
 

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you need to show us top end of the box.
 
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