Rubber Wood Coefficient Of Friction

A good way to determine the coefficient of friction is to do a test with the actual materials.

Rubber wood coefficient of friction.

The value of μ s is generally higher than the value of μ k for a given combination of materials. Hard rubber on dry concrete. For glass on glass 0 4. Soft rubber on dry concrete.

Static friction is friction between two or more solid objects that are not moving relative to each other. The maximum force of static friction can be calculated by multiplying the normal force by the coefficient of friction specific to the pair of materials in contact. The dynamic coefficient of friction are. Static friction results from the normal force of two objects in contact acting opposite the intended motion of one surface against the other.

N normal force between the surfaces n lb there are at least two types of friction forces. The coefficient of friction depends on the materials used. Static and kinetic coefficient of friction. For example static friction can prevent an object from sliding down a sloped surface.

For example ice on steel has a low coefficient of friction while rubber on pavement has a high coefficient of friction. Typical values for the coefficient of friction when sliding is occurring i e. Hard rubber on dry wood. The coefficient of static friction typically denoted as μ s is usually higher than the coefficient of kinetic friction.

Hard plastic on dry wood. Where μ s is the coefficient of static friction and μ k is the coefficient of kinetic friction. For rubber on tarmac close to 1 0. The coefficient of friction is the ratio of a force to a force and hence has no units.

Soft plastic on dry wood. Coefficients of friction between materials are best determined through testing. For polished oiled metal surfaces less than 0 1. F f frictional force n lb.

The static and kinetic friction coefficient values reference table shown in this article will be helpful for finding the cof values of commonly used materials. In your case build a ramp made of wood and place a sample of the rubber material on the ramp. The frictional force can be expressed as. However it is possible to find tables in the literature for friction coefficients between various materials.

The friction force of a 100 lbwooden crate pushed across a concrete floor with friction coefficient of 0 62 can be calculated as. Coefficients of friction range from near zero to greater than one. Soft rubber on dry wood. Soft plastic on dry concrete.

Now slowly increase the angle of the ramp until the rubber just begins to slip. Hard plastic on dry concrete. μ static μ s or kinetic μ k frictional coefficient. Showing the concept of coefficient of friction.