Rubber Wood Coefficient Of Friction

Static and kinetic coefficient of friction.

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. The friction force of a 100 lbwooden crate pushed across a concrete floor with friction coefficient of 0 62 can be calculated as. The coefficient of friction depends on the materials used. Coefficients of friction range from near zero to greater than one.

Static friction results from the normal force of two objects in contact acting opposite the intended motion of one surface against the other. For example ice on steel has a low coefficient of friction while rubber on pavement has a high coefficient of friction. Static friction is friction between two or more solid objects that are not moving relative to each other. In your case build a ramp made of wood and place a sample of the rubber material on the ramp.

Showing the concept of coefficient of friction. Typical values for the coefficient of friction when sliding is occurring i e. The dynamic coefficient of friction are. Hard plastic on dry wood.

For rubber on tarmac close to 1 0. μ static μ s or kinetic μ k frictional coefficient. Hard plastic on dry concrete. For glass on glass 0 4.

Where μ s is the coefficient of static friction and μ k is the coefficient of kinetic friction. For polished oiled metal surfaces less than 0 1. For example static friction can prevent an object from sliding down a sloped surface. Coefficients of friction between materials are best determined through testing.

The frictional force can be expressed as. Hard rubber on dry concrete. Soft plastic on dry concrete. The coefficient of static friction typically denoted as μ s is usually higher than the coefficient of kinetic friction.

N normal force between the surfaces n lb there are at least two types of friction forces. 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. F f frictional force n lb. However it is possible to find tables in the literature for friction coefficients between various materials.

Hard rubber on dry wood. Now slowly increase the angle of the ramp until the rubber just begins to slip. Soft rubber on dry concrete. The coefficient of friction is the ratio of a force to a force and hence has no units.

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. Ff 0 62 100 lb 62 lb 1 lb 0 4536 kg example car stopping distance. Soft plastic on dry wood. F f μ n 1.