Question

Read statement-1 and statement-2 and choose the correct option. Statement-1 : In some situations, friction facilitates the motion and in some situations, it opposes the motion. Statement-2 : Friction force always opposes the relative motion between two surfaces in contact. Choose the correct option. (1) Only statement-1 is correct (2) Only statement-2 is correct (3) Both statement-1 and statement-2 are correct (4) Neither statement-1 nor statement-2 is correct

Answer 1

statement 1 :- In some situations, friction facilitates the motion and in some situation , it opposes the motion.
of course ! in some situation , friction supports the motion. for example : you take wheels in such a way that rotating one wheel rotates other wheel too in the opposite direction which is what you wanted, then that would be supporting the motion. and what I say above friction oppose the motion. if a body moves with respect to earth's surface , a contact force act between them , it acts in opposite direction of motion , e.g., friction.

statement 2 :- Friction force always opposes the relative motion between two surfaces in contact. yes it is 100% correct.

hence, option (1) and (2) both are correct
so, option (3) is correct.

Answer 2

Here, statement 2 is correct.

When we take a look at friction we see that it always tends to oppose relative motion when it comes to contact between two different surfaces.

This means that friction always tend to act in the opposite direction and hence it opposes the motion that the object is in.