Question

Frictional force is _ to
normal reaction​

Answer 1

Answer:

As long as the normal reaction remains the same, the magnitude of limiting friction is independent of the area, and the shape of surfaces that are in contact. The magnitude of the limiting friction F is directly proportional to the normal reaction R between the two surfaces which are in contact.

Answer 2

Explanation:

as long as the normal reaction r remain the same,the magnitude of limitations friction is dependent of the area ,and the shape of surface that are in contact.