Question

a) Write Laws of friction.
घर्षण के नियम लिखें।
b) An object of weight 100N is kept in position
on a rough horizontal plane. Determine the
min magnitude of force, applied at 30° with
the horizontal, required to pull this object.
Coefficient of friction is 0.25.​

Answer 1

Answer :

(a) First law of friction: The amount of friction is proportional to the normal force exerted between the surfaces.

Second law of friction: Friction does not depend on the area of contact between the object and the surface.

Third law of friction: Friction force also depends on the nature of the surfaces in contact.