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With what material? Coefficient of friction is for two materials.
You need two different materials to determine the coefficient of friction. Without another material you cannot know what the coefficient of friction is.
The coefficient of friction depends on the type of materials. Different pairs of materials have different cofficients of friction.
Friction equals the coefficient of friction times the normal force. Friction increases as the roughness of the materials increases. It also increases as the force pushing the materials together increases.
The ratio of resistance force to effort force is a mechanical advantage.
The strength of the force of friction depends on the types of surfaces involved and on how hard the surfaces push together.
With what material? Coefficient of friction is for two materials.
You need two different materials to determine the coefficient of friction. Without another material you cannot know what the coefficient of friction is.
The coefficient of friction depends on the type of materials. Different pairs of materials have different cofficients of friction.
No, coefficient of friction is dependent on the materials in contact, not their mass. However the FORCE of friction will increase as the mass increases in this case.
Friction equals the coefficient of friction times the normal force. Friction increases as the roughness of the materials increases. It also increases as the force pushing the materials together increases.
The ratio of resistance force to effort force is a mechanical advantage.
Depends on the other surface. Coefficients of friction are generally tabulated for pairs of materials. Emery cloth on Teflon, for example, will have a lower coefficient of friction than emery cloth on rubber.
Different materials have different coefficients of friction because the materials have different microscopic bumps and valleys which cause the friction to begin with. Coefficients of friction are constant for each material.
One formula that is frequently used is: friction = mu x Fn, where mu (the Greek letter mu) is the coefficient of friction, and Fn is the normal force - the force that pushes the surfaces together, perpendicular to the surface. The coefficient of friction depends on the combination of materials; you can look it up in tables for different combinations of materials; or you can determine it experimentally.
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One formula that is frequently used is: friction = mu x Fn, where mu (the Greek letter mu) is the coefficient of friction, and Fn is the normal force - the force that pushes the surfaces together, perpendicular to the surface. The coefficient of friction depends on the combination of materials; you can look it up in tables for different combinations of materials; or you can determine it experimentally.