Rubber Wood Coefficient Of Friction

μ static μ s or kinetic μ k frictional coefficient.

Rubber wood coefficient of friction.

Soft rubber on dry wood. For example static friction can prevent an object from sliding down a sloped surface. F f μ n 1. Hard plastic on dry wood.

Coefficients of friction range from near zero to greater than one. The coefficient of static friction typically denoted as μ s is usually higher than the coefficient of kinetic friction. Hard plastic on dry concrete. In your case build a ramp made of wood and place a sample of the rubber material on the ramp.

Soft plastic on dry wood. Static friction results from the normal force of two objects in contact acting opposite the intended motion of one surface against the other. Hard rubber on dry concrete. F f frictional force n lb.

The coefficient of friction depends on the materials used. The dynamic coefficient of friction are. For rubber on tarmac close to 1 0. 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.

For glass on glass 0 4. Coefficients of friction between materials are best determined through testing. The friction force of a 100 lbwooden crate pushed across a concrete floor with friction coefficient of 0 62 can be calculated as. However it is possible to find tables in the literature for friction coefficients between various materials.

For polished oiled metal surfaces less than 0 1. Soft plastic on dry concrete. Static friction is friction between two or more solid objects that are not moving relative to each other. For example ice on steel has a low coefficient of friction while rubber on pavement has a high coefficient of friction.

Where μ s is the coefficient of static friction and μ k is the coefficient of kinetic friction. Static and kinetic coefficient of friction. Showing the concept of coefficient of friction. N normal force between the surfaces n lb there are at least two types of friction forces.

The frictional force can be expressed as. 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. Ff 0 62 100 lb 62 lb 1 lb 0 4536 kg example car stopping distance. Typical values for the coefficient of friction when sliding is occurring i e.

A good way to determine the coefficient of friction is to do a test with the actual materials. Hard rubber on dry wood. The value of μ s is generally higher than the value of μ k for a given combination of materials. Now slowly increase the angle of the ramp until the rubber just begins to slip.