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Gottlieb wrote:
The picture shows a cell phone and a pair of glasses that should
not slide when the car accelerate. What causes the grip?
Ludwik Kowalski
It's either invisible glue deposited by a fairy or it's surface
attraction due to molecular forces between smooth flat surfaces
in close approximity.
The surface is not smooth. Looking through a magnifying glass I see
a lot of bumps, like on leather.