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human joints are an excellent example. they have a static friction coefficient of .01 μs and a kinectic friction coefficient of .003 μk
another good example would be waxed wood on dry snow (as in a snowboard on a ski slope) this has a static friction coefficient of .04 μs
Hope this helped!
What else can I help you with?
Describe 3 examples where low friction is not useful?
Friction is very useful but it has its own disadvantages. Friction causes wear and tear. Friction spoils the soles of our shoes. friction reduces speed This is all wrong some not useful types of friction are are when airplanes fly the friction causes heat that materials that will withstand which are costly.
How does lubricating machinery-such as the chain on your bike reduce friction?
The surface tension between the metal on your chain pieces is high. The surface tension is low on lubricants like oil or graphite so putting them between moving surfaces provides a opposing surface for both materials that has a low friction.
The efficiency of the wedge is low because of?
friction or The mechanical advantage is greater for thinner wedges. However, the efficiency is low because of the large amount of friction.
How does friction with the atmosphere affect the speed of an artificial satellite?
Satellites in a low orbit, however, are slowed by friction with Earth's atmosphere.
What force would help you slide down a slide?
Gravity? the strength of the floor?
How does a styrofoam relate to friction?
Styrofoam has a low coefficient of friction, meaning it is very smooth and produces little resistance when in contact with other surfaces. This low friction coefficient allows styrofoam to slide easily across surfaces.
Give an example of two surfaces that would have a low coefficient of friction?
Friction is the static electricity of two things that are rubbed against each other. Ice would have a low coefficient of friction, as things could easily slide across it. This would also make sense for something like marble, which is very smooth.
What is the coefficient of friction for talcum powder.?
The coefficient of friction for talcum powder can vary depending on the surfaces it is in contact with. On average, talcum powder has a low coefficient of friction due to its fine, powdery texture. It is commonly used to reduce friction between surfaces.
What is the coefficient of friction of molybdenum?
The coefficient of friction of molybdenum can vary depending on the specific conditions of the surfaces in contact. However, in general, molybdenum has a low coefficient of friction, typically around 0.2-0.3, making it a good choice for applications requiring lubricity and wear resistance.
What surfaces produce more friction than other surfaces?
Rough surfaces typically produce more friction than smooth surfaces because there are more contact points between the surfaces, leading to greater resistance to motion. Surfaces with greater texture or irregularities also tend to create more friction due to increased interlocking of surface features. Additionally, surfaces with high coefficient of friction materials, such as rubber or sandpaper, generate more friction than surfaces with low coefficient of friction materials like ice or glass.
What are the factors which affect the coefficient of static friction?
Dry surfacesFor low surface pressures the friction is directly proportional to the pressure between the surfaces. As the pressure rises the friction factor rises slightly. At very high pressure the friction factor then quickly increases to seizingFor low surface pressures the coefficient of friction is independent of surface area.At low velocities the friction is independent of the relative surface velocity. At higher velocities the coefficent of friction decreases.Well lubricated surfacesThe friction resistance is almost independent of the specific pressure between the surfaces.At low pressures the friction varies directly as the relative surface speedAt high pressures the friction is high at low velocities falling as the velocity increases to a minimum at about 0,6m/s. The friction then rises in proportion the velocity 2.The friction is not so dependent of the surface materialsThe friction is related to the temperature which affects the viscosity of the lubricant
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.
Why the coefficient of friction cannot be zero?
The coefficient of friction is an empirical measurement and has to be measured experimentally, and cannot be found through calculations. Rougher surfaces tend to have higher effective values. Most dry materials in combination have friction coefficient values between 0.3 and 0.6. Values outside this range are rarer, but Teflon, for example, can have a coefficient as low as 0.04. Therefore, a value of zero would mean no friction at all, an ELUSIVE property even magnetic levitation vehicles have drag.
What is an Example of low coefficient of friction?
One example of a material with a low coefficient of friction is polytetrafluoroethylene (PTFE), commonly known by the brand name Teflon. PTFE is a synthetic fluoropolymer that exhibits excellent non-stick properties and is widely used in applications where reduced friction is desirable, such as in cookware and as a lubricant.
What is the Coefficient of friction for synovial joint?
The coefficient of friction for synovial joints is generally low, ranging from 0.01 to 0.03. This low friction allows smooth movement of the joints without excessive wear and tear. The synovial fluid within the joint cavity helps reduce friction by providing lubrication between the articulating surfaces.
What are the affect on Teflon on friction?
Teflon is known for its low coefficient of friction, which reduces the amount of friction between surfaces. This makes it an effective material for non-stick coatings in cookware and as a lubricant in industrial applications.
When friction needs to be reduced?
Friction can be reduced by using lubricants, such as oil or grease, to create a barrier between surfaces. Using materials with low coefficient of friction, like Teflon or nylon, can also help decrease friction. Additionally, polishing or smoothing surfaces can reduce the contact area and therefore friction.
