Home
Class 11
PHYSICS
(A) : Polishing a surface beyond a certa...

(A) : Polishing a surface beyond a certain limit increases rather than decreases the frictional forces .
(R) : When the surface is polished beyond a certain limit , the molecules exert strong attractive force . This is called surface adhesion , to overcome which additional force is required . Hence frictional force increases .

A

If both A and R are true and R is the correct explanation of A .

B

If both A and R are true but R is not correct explanation of A .

C

If A is false but R is false .

D

If A is false but R is true

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • FRICTION AND CIRCULAR MOTION

    GRB PUBLICATION|Exercise Matrix - Match|5 Videos

  • FRICTION AND CIRCULAR MOTION

    GRB PUBLICATION|Exercise Integer answer|20 Videos

  • FRICTION AND CIRCULAR MOTION

    GRB PUBLICATION|Exercise More than one correct|18 Videos

  • FORCE AND NEWTONS LAWS OF MOTION

    GRB PUBLICATION|Exercise Comprehension|12 Videos

  • MOTION IN A STRAIGHT LINE

    GRB PUBLICATION|Exercise Comprehension type Queston|14 Videos

Similar Questions

Explore conceptually related problems

Why frictional force gets increased when two surfaces in contact are polished beyond a certain limit ?

TRUE/FALSE TYPE QUESTIONS: Frictional force gets increased when a surface is polished beyond a certain limit.

With increase of temperature the friction force acting between two surfaces .

When the stress is increased beyond the elastic limit, the length of the wire starts increasing without increasing the force. This point is called

The angle made by the resultant of normal reaction and limiting value of frictional force with normal to the surface is called ?

Which force gets reduced when the two surface in contact are polished to make them smooth ?

Limiting value of static frictional force on a block placed on the rough surface depends on

When a person walls on a rought surface, the frictional force exerted by the surface on the person is opposite to the direction of his motion.