Question

Which of the following statements about friction
is true?
(a) Friction can be reduced to zero
(b) Frictional force cannot accelerate a body
(c) Frictional force is proportional to the area of
contact between the two surfaces
(d) Kinetic friction is always greater than rolling
friction

Answer 1

Answer:

I don;t

Explanation:

Answer 2

(C) Frictional force is proportional to the area of contact between the   two surfaces

About Friction Force :

• We already know that frictional force is only determined by friction coefficient and normal force.

• The type of the contact surface, not the area of contact, determines the friction coefficient.

• The normal response is likewise unaffected by the contact area. As a result, the statement "Frictional force is proportionate to the area of contact between the surfaces" is incorrect.

• Frictional force can theoretically be zero for highly polished surfaces, ice, and other materials. In reality, however, this is not achievable.