Question

When you press a rubber sucker on a smooth surface it sticks to the surface .Explain why this happens

Answer 1

When we press a rubber sucker on a smooth surface it sticks to the surface .it is because:

When we press a sucker on a smooth surface, it removes 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.