Coefficient Of Static Friction Tires On Asphalt

For calculating minimum stopping distance a value of 0 8 is a nominal value for the coefficient of static friction between good tires and a good road surface.

Coefficient of static friction tires on asphalt. The usual estimate for dry asphalt is about 0 8. The coefficient of static friction typically denoted as μ s is usually higher than the coefficient of kinetic friction. On dry surfaces you might get as high as 0 9 as a coefficient of friction but driving them on wet roads would be dangerous since the wet road coefficient might be as low as 0 1. F f frictional force n lb.

N normal force between the surfaces n lb there are at least two types of friction forces. For example static friction can prevent an object from sliding down a sloped surface. E is the euler number and is equal to 2 718281828. Static friction is friction between two or more solid objects that are not moving relative to each other.

The source is typical. The frictional force can be expressed as. Ssuming a constant acceleration and no slipping of tires estimate the coefficient of static friction needed for a drag racer to cover 1 9 km in 17 s starting from rest. The tread design represents an all weather compromise.

Where g is the gravitational acceleration v is the initial velocity when the brakes are applied and f r is the rolling resistance coefficient and was assume to be equal to 0 013. F f μ n 1. μ static μ s or kinetic μ k frictional coefficient. The friction force is the force exerted by a surface when an object moves across it or makes an effort to move across it.

Drag race tires in contact with an asphalt surface have a very high coefficient of static friction. Assuming a constant acceleration and no slipping of tires estimate the coefficient of static friction needed for a drag racer to cover 1 0 km in 12 s starting from rest. If you were an indianapolis race driver you would use slick racing tires with no tread.