What is friction coefficient formula?
coefficient of friction, ratio of the frictional force resisting the motion of two surfaces in contact to the normal force pressing the two surfaces together. It is usually symbolized by the Greek letter mu (μ). Mathematically, μ = F/N, where F is the frictional force and N is the normal force.
What is the value of friction coefficient?
0 to 1
Typical values for the coefficient of friction generally range from 0 to 1. A value close to zero indicates that only a small force is required to cause movement of one object over the other. A value is closer to one means a large force is required.
What is the best friction coefficient?
11 Contact Materials with the Highest Coefficient of Friction
- Solid on Rubber. 1.0 – 4.0.
- Silver on Silver. 1.4.
- Aluminium on Aluminium. 1.05 – 1.35.
- Platinum on Platinum. 1.2.
- Cast Iron on Cast Iron. 1.1.
- Copper on Cast Iron. 1.05.
- Copper on Copper. 1.0.
- Iron on Iron. 1.0.
What is the minimum friction coefficient?
Friction coefficient as low as 0.05 between dry sliding surfaces has been achieved when the mechanical interactions are eliminated.
Why is coefficient of friction important?
According to the Newnes Engineering and Physical Science Pocket Book, coefficient of friction is the amount of friction existing between two surfaces. A low value of coefficient of friction means less force is required for sliding to occur. A higher value means more force is required.
What happens if the coefficient of friction is 1?
A value of 1 means the frictional force is equal to the normal force. It is a misconception that the coefficient of friction is limited to values between zero and one. A coefficient of friction that is more than one just means that the frictional force is stronger than the normal force.