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Generally surface roughness increases friction. For example, take a piece of course sandpaper and rub it on a piece of wood. The smooth side will slide easier to slide on the wood than the rough side.
Then you might ask why Indy Car tires are smooth.
Groves were put in tires to wick water away from between the surface of the road and the tire to prevent hydroplaning.
Indy tires are run on dry surfaces. And, the lack of groves increases the surface area. Also note they use very very grippy rubber, kind of like the paper separation rollers on a laser printer.
Another exception might be that very smooth, flat items stuck together can form a seal, with or without the presence of a lubricant like grease or water. A seal can increase friction more than would otherwise be expected.
Surface roughness or imperfections can break the seal and decrease friction.
One final note is that the surface dimpling on a Golf ball might actually help make a static air buffer around the golf ball and decrease it's air friction.
What else can I help you with?
What is the best way to reduce friction on a plane?
To reduce friction on a plane, aerodynamic designs like smooth surfaces, streamlined shapes, and reducing surface roughness can help. Additionally, using lubricants on moving parts and ensuring proper maintenance can also help reduce friction.
Why do smooth surfaces appear uneven on a microscopic level?
The constituent particles (i.e. atoms ) are supposed to be spherical in shape.We get voids of different types like tetrahedral or triangular when these particles are arranged in a sequence to give a particular structureTherefore,at microscopic level when we get wider and larger view of a surface we get that there is absence of homogeneity in structure and the structure is uneven. If the atoms' were have been square shaped they might created homogeneity and the structure would have been even giving place to even surfaces.
What are the main factors on which friction depends?
the amount of friction depends on the type of surfaces that are rubbing against each other. when surfaces are smooth, they move against each other more easily. friction is greater between rough surfaces. in order to reduce friction in the moving parts of machines, scientists and engineers use oil and other lubricants. these lubricants make the surface smoother.
What caused the surface of the moon to look the way it does?
The surface of the moon looks the way it does because of impacts from asteroids and comets, volcanic activity, and the lack of atmosphere to weather or erode the surface.
What are the different ways on how to reduce and increase frictional force?
To reduce frictional force, you can use lubricants or materials with lower friction coefficients, polish surfaces to make them smoother, or decrease the contact force between surfaces. To increase frictional force, you can increase the roughness of surfaces, apply greater force pressing the surfaces together, or use materials with higher friction coefficients.
What does mean by covert operation?
a simple way of explaining a covert operation is a secret mission
What is a simple way of explaining a disease?
A disease is when mental, physical or sometimes social health is affected due to an ifection of pathogens. It is only a disease if you have the symptoms of the disease (eg. white spots on the tonsils for tonsillitis)
What is a six letter word that is a way of explaining an object or event by using a set of facts?
A six letter word that is a way of explaining an object by using a set of facts is called a theory.
Why are you atracted to men?
Because that's the way you are wired. There is no way of explaining why we like anything. It simply is.
Does the way the mitochondria look affect the way it works?
Not really, but all the "roughness" of its membrane allows the speed of reaction with the host cell to speed up.
How is light refracted and reflected?
Light is perfectly reflected from a surface when the roughness of the surface is small compared to the wavelength of the light. Otherwise the reflection is diffuse.Light is refracted when it passes from one medium to another of a different refractive index. One in which the light travels at a different speed than in vacuo.
How will you feel that you are already reaching your climax?
theres no real way of explaining it. lets just say you forget everything for a moment and just feel great, with whole your body. or another way of explaining it: you will sure notice it ^^
What can be an expository topic?
Expository writings explain a topic to a reader in a systematic, logical way. As such topics can be anything you have knowledge about, such as explaining the way to use a computer, explaining three different interpretations of green marketing, etc.
How does geography help explain the past?
explaining why certain events occurred the way they did.
What is a anti-semtism?
The easy way of explaining it is "racism against Jewish people".
Why is Ryan such a baller?
That's just the way it is. There's no explaining it. It's science.
What is the best way to reduce friction on a plane?
To reduce friction on a plane, aerodynamic designs like smooth surfaces, streamlined shapes, and reducing surface roughness can help. Additionally, using lubricants on moving parts and ensuring proper maintenance can also help reduce friction.
