When we press a rubber sucker on a smooth surface,it sticks to the surface.Explain why this happens in about 30 words.

When we press a sucker on a smooth surface we remove some of the air between the sucker and the smooth surface. This deficiency of air lets the air outside exert pressure on the surface of the sucker and the surface so as to refill the air expelled. Force due to the pressure keeps the sucker stuck to the surface.

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 This is because of the atmospheric pressure. We have to apply a larger force to remove the sucker because the area and the power of the atmospheric pressure is much more than the rubber sucker.

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