rubber suction hooks stick to smooth walls can stay steady ever with heavy objects are hanged with why??
Answers
Answer:
because the air trapped in in the suction hook and out side air put force from out side so th
The working face of the suction cup is made of elastic, flexible material and has a curved surface.[3] When the center of the suction cup is pressed against a flat, non-porous surface, the volume of the space between the suction cup and the flat surface is reduced, which causes the air or water between the cup and the surface to be expelled past the rim of the circular cup. The cavity which develops between the cup and the flat surface has little to no air or water in it because most of the fluid has already been forced out of the inside of the cup, causing a lack of pressure. The pressure difference between the atmosphere on the outside of the cup and the low-pressure cavity on the inside of the cup keeps the cup adhered to the surface.