Friction is like the "evil" of all motions. No matter which direction something moves in, friction pulls it the other way. Move something left, friction pulls right. It is a force that appears whenever two things rub against each other.
How to measure friction ? Frictional force (Ff) is equal to the coefficient of friction (µ) multiplied by the normal force (Fn).
Definition of coefficient of friction --> The coefficient of friction is a number which represents the friction between two surfaces. Between two equal surfaces, the coefficient of friction will be the same. The symbol usually used for the coefficient of friction is (µ)
Definition of normal force -->
The force exerted by a surface on an object in contact with it which prevents the object from passing through the surface; the force is perpendicular to the surface, and is the only force that the surface exerts on the object in the absence of frictional forces.
However, i do not know how to measure this two things, any suggestions ?
Good start! Check other sources.... Never just depend on one website! You stated correctly that friction is a force. Can it be measured?
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