Question

state the law of limiting friction

Answer 1

1. The direction of limitingfrictional force is always opposite the direction of motion. 2.Limiting friction acts tangential to the two surfaces in contact. 3.The magnitude of limiting friction is directly proportional to the normal reaction between the two surfaces.
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Answer 2

When an object is moving, the friction is proportional and perpendicular to the normal force (N)

Friction is independent of the area of contact so long as there is an area of contact.

The coefficient of static friction is slightly greater than the coefficient of kinetic friction.

Within rather large limits, kinetic friction is independent of velocity.

Friction depends upon the nature of the surfaces in contact.