How do suction cups work to hold things up?
In: Physics
Air is really light, but there is a lot of air above us in the atmosphere. The weight of all this air creates a force that pushes down on us. When you push a suction cup into a surface, there used to be air inside, but now there isn’t as much, creating a low pressure and thus low force region. The force exerted by the air inside is much less than the force exerted by the air around us, so the air pushes on the cup and holds it in place.
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