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What is physical difference between surfaces with high and low coefficients of friction?
Wiki User
∙ 10y ago
A high coefficient of friction may be caused by a rough surface. It may also be the result of surfaces sticking together, as in the case of rubber which tends to stick to certain surfaces, at least when it is dry. Lubrication - such as a thin layer of oil - tends to reduce the coefficient of friction.
Wiki User
∙ 10y ago
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Why are coefficients of friction unitl-ess values?
Contacting surfaces can be of various materials
What are two examples of two surfaces that have a high coefficient of friction?
Sandpaper and asphalt both have relatively high coefficients of friction.
How will different surfaces affect the speed of a roller skate on an incline plane?
It depends on its roughness of the surface. The roughness on the surfaces will tell you how much friction will be acting. It is believed that the friction is caused by the interaction of the particles at sub-atomic level. The greater the interaction between the particles, the greater the friction. The more rough the surface, the less area will interact with both surfaces. Different surfaces, will have different friction coefficients, which decide if the roller skate will slip or not slip.
What happened to the coefficients of friction as the surface area of the contact increased?
As the coefficient of friction is not function of the area or not related to the area of the contact surface so the coefficient of friction remains constant on the increase of the contact area. The coefficient of friction depends upon the material of the friction surfaces only.
What happened to the work used to overcome friction?
It's mostly converted to heat. Some of it can be used for the physical work of wearing down the surfaces causing the friction, depending on the hardness of the surfaces and their friction coefficient.
Why are coefficients of friction unitl-ess values?
Contacting surfaces can be of various materials
What are two examples of two surfaces that have a high coefficient of friction?
Sandpaper and asphalt both have relatively high coefficients of friction.
How will different surfaces affect the speed of a roller skate on an incline plane?
It depends on its roughness of the surface. The roughness on the surfaces will tell you how much friction will be acting. It is believed that the friction is caused by the interaction of the particles at sub-atomic level. The greater the interaction between the particles, the greater the friction. The more rough the surface, the less area will interact with both surfaces. Different surfaces, will have different friction coefficients, which decide if the roller skate will slip or not slip.
What are two examples of two surfaces that have a low coefficient of friction?
Ice and glass both have very low coefficients of friction because they are very smooth, so it is easier for a substance to glide over them.
What happened to the coefficients of friction as the surface area of the contact increased?
As the coefficient of friction is not function of the area or not related to the area of the contact surface so the coefficient of friction remains constant on the increase of the contact area. The coefficient of friction depends upon the material of the friction surfaces only.
What happened to the coefficients of friction as the surface area of the contact increases?
As the coefficient of friction is not function of the area or not related to the area of the contact surface so the coefficient of friction remains constant on the increase of the contact area. The coefficient of friction depends upon the material of the friction surfaces only.
What happened to the work used to overcome friction?
It's mostly converted to heat. Some of it can be used for the physical work of wearing down the surfaces causing the friction, depending on the hardness of the surfaces and their friction coefficient.
Is friction caused by gravity?
No, friction is caused by the electrostatic attractions between atoms on contacting surfaces and physical surface irregularities. Gravity has no effect on friction.
Can coefficient of friction be more than 1?
Yes.This would just mean the force of friction could be greater than the normal force.Also, keep in mind that the static coefficients are greater than or equal to the kinetic coefficients for the same two surfaces.Some surfaces with higher than 1 static friction coefficients include:Platinum on platinum (1.2)Cast iron on cast iron (1.1)Silver on silver (1.4)Rubber on various surfacesNote that it's just that most surfaces have a both coefficients below 1. Inclusion of Rubber in the list above gives us the clue that it's all about being "sticky" or "slippery"!
Air interacting with what causes friction?
Surfaces of physical objects, or the surface of the Earth (wind).
What surface has the least amount of friction?
The surfaces used as the measure of lowest friction are generally wet ice on wet ice. Some materials, such as superfluid Helium III have no measurable friction.
What types of surfaces create the most friction?
If both of the surfaces on which friction is to be created are very rough, the friction will be more. The more rough the surfaces more friction we have.
