Wet surfaces are more slippery .give reasons.?

Answer 1

On a molecular scale, even the smoothest (solid) materials like polished metal have all kinds of mountains and valleys. When two materials rub together, these mountains and valleys alternately lock together and slip. This is what creates friction. Rubber, due to its flexibility, is very good at conforming to all the microscopic pits and lumps in materials, which is why it has a high coefficient of friction.

However, when water (or especially oil) is put between the materials, it finds its way into all the cracks. Now the two materials aren't touching each other in as many places. Water shears easily, offering almost no friction, so the reduced contact area decreases the amount of mechanical locking, which decreases friction.

Answer 2

Not in all cases.For example wet glue or tar is tacky,while the dried substances are not,but for the must part when a surface is wet it is slicker.I believe the main reason is that since a fluid is not compressable,it is superior when acting as molecular ball bearings.In other words it provides more surfaces between and around the molecules of a solid surface,so when another surface comes into contact with said surface it actually is bouyed up(or kept from contacting)the original surface by the fluid,the fluid then bears the balance of forces between the two surfaces while allowing them to slide by each other.

Answer 3

Depends on the surface and the liquid. If you're talking a wet paper towel with water, it's not more slippery. But if you're talking wax paper or a countertop with water, then it's due to the covalent bonding properties of the water. It bonds to itself, not the wax paper or countertop, creating a barrier of sorts, allowing for movement, thus making it slippery. Different liquids also have different chemical properties as well, so it would depend on that. For example bases usually have a slippery texture to them compared to acidic substances. So regardless of what surface it is (usually) basic liquids will have a more "slippery" feel than acidic liquids (I'm not telling anyone to go touch acids and bases.)

Answer 4

Our grip on any surface depends on type of surface and friction between two bodies of surfaces. Presence of any liquid between two surfaces usually reduce friction. When one body is in movement, this reduced friction makes it slippery. If the wetting liquid is oil or anything like that - lubricant it will greatly reduce the friction and it will be much more slippery.

Answer 5

Placing a liquid between two surfaces eliminates contact between those two surfaces. This allows free motion, as the contact between the surfaces is greatly reduced or eliminated. This is why friction is reduced.

Think of a car hydroplaning on the road, or a fluid film bearing. The object is riding up on the fluid, rather than on the solid surface.

Answer 6

Less friction.

Answer 7

due to less friction ofcourse
i dont know any other reason.

Answer 8

bcoz they reduce friction(lubricant)