Question

Define angle of friction.

Answer 1

Friction:

1. Friction is the force that prevents one solid object from sliding or rolling over another.
2. Frictional forces, required to walk without slipping, car moving etc

Angle of friction:

1. Angle made by the resultant of normal reaction and limiting friction with the normal reaction is called the angle of friction.
2. The coefficient of static friction is equal to the tangent of the angle of friction.