What is the static friction coefficient?

2 This is a value used in static systems in which two or more objects are at rest together, and represents an indication of force that will be required to move one of the objects. The static friction coefficient is usually symbolized by the Greek letter "MU" and is different depending on the materials from which objects can be made. The force required to start the movement of normal force by the normal force creates a numeric value that is a static friction coefficient for these objects or materials from which they are made. At rest, such as a wooden block lying on a wooden plate, the normal force is the same as the gravitational force and prevents the block from entering the plate.

4 For example, a wood block on top of a wooden board has a static coefficientThe friction somewhere between 0.25 and 0.5, which is relatively low. Teflon, one of the most beautiful materials, has a static friction coefficient with most other materials about 0.04.

Rubber on dry concrete has a static pacery coefficient of about 1.0, allowing tires on the vehicle to stick to the road and get the car to stop. When one end of the previously mentioned wooden board is slightly brought up and creates a slope, the wooden block remains at first at rest and the system remains static. This is because the force pulling the wooden block on the slope is not enough to overcome static friction between two wooden surfaces.

At a certain angle, however, the gravitational force is great enough to overcome the friction force between the two objects and the wooden block begins to slip on the board. The gravitational force required to move the wooden block on the board must be greater than the static friction coefficient, multiplied by the mass of the block multiplied by normal force. If an object is not at an angle, a normal force is equal to gravitational force or HMOThe object, but as the angle increases, the normal force is reduced and at the right angle, Lo Lo is not a lonatolic great to make the system static. At this point, movement begins and the friction force becomes kinetic friction rather than static friction.