Question

The frictional force is?
(A) Self-adjustable
(B) Not self- adjustable
(C) Scalar quantity
(D) Equal to limiting force

Answer 1

Hint : to solve this question we have to know about frictional force in details. We know that Frictional power is the contradicting power that is made between two surfaces that attempt to move the very way or that attempt to move in inverse ways. The principal motivation behind a frictional power is to make protection from the movement of one surface over the other surface.

Complete Step By Step Answer:
We know that friction force is a self-adjustable force. Because it tries to keep the object in rest until an unbalanced force is applied on the object. Therefore the magnitude of static friction is equal to external force till it remains as balanced force.
So, the right answer will be option number A.

Note :
we have to know that in simple statements, as friction is a force and the S.I. unit of force is Newton, the S.I. The unit of friction is Newton. We also can say, the coefficient of friction is dimensionless and it does not have any unit. It is a scalar, meaning the direction of the force does not affect the physical quantity. We can say, motor grating emerges when the item moves comparative with the surface after the applied power defeats the static contact. Dynamic contact can be of two kinds. Assuming the article is sliding absurd, it encounters sliding grinding. On the off chance that the article turns over the surface, it is called moving grating.