Question

why does a rubber suker stick to a surface​

Answer 1

Answer:

When we press a rubber suker on a smooth surface, it sticks to the surface because there is very little air between the suker and the smooth surface to push from inside.

Explanation:

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Answer 2

In simple terms, the rubber cup sticks to a surface due to the difference in atmospheric pressure.

• A rubber cup is made comprised of a hollow hemisphere of rubber with a stick attached to the top. The rubber cup attaches to a surface when pressed against it.
• Atmospheric pressure is the result of molecules in the air exerting pressure on the objects around them.
• The number of air molecules determines the pressure.
• All of the air molecules inside the rubber cup escape when we press it against a surface.
• As a result, there are fewer air molecules inside the cup than there were previously. Therefore, the pressure outside the cup is greater than the pressure inside.
• As a result, the cup is subjected to two forces.
• However, the outside force is greater than the inside force.
• Thus the rubber cup's net force is directed towards the surface and the cup is pressed against the surface.