What is Limiting Friction?

The amount of friction that can be applied between two surfaces is limited and if the forces acting on the body are made sufficiently great, the motion will occur. Hence, we can define limiting friction as the maximum value of static friction that comes into play when the body is just at the point of sliding over the surface of another body. Limiting friction is the product of normal force and coefficient of limiting friction. Mathematically, this is represented as

$$F=mu N$$

Here,$$mu$$ is the coefficient of limiting friction and N is the normal force

The limiting friction is always opposite to the motion of the object.