Question

what is a course of friction of two surface​

Answer 1

Explanation:

The reciprocal of tanθ is cotθ. ⇒cotθ=1tanθ=10.2. This means the angle of friction between the given two surfaces is cot−1(5).

Answer 2

Answer:

Friction is caused due to the irregularities on the two surfaces in contact. Even the smoothest surfaces have minute irregularities in them and these irregularities of the two surfaces interlock into each other and create friction. Larger the irregularities more is the friction.

Explanation:

hope it is correct