Home
Class 8
PHYSICS
Rougher surfaces have friction between t...

Rougher surfaces have ______friction between them than smoother surfaces

A

more

B

less

C

equal

D

no

Text Solution

AI Generated Solution

The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding Friction**: Friction is the force that opposes the relative motion of two surfaces in contact. It is influenced by the nature of the surfaces involved. 2. **Identifying Surface Types**: Rough surfaces (like concrete or sand) have irregularities and protrusions that interlock with each other, leading to higher friction. In contrast, smoother surfaces (like ice or wet tiles) have fewer irregularities, allowing for easier sliding. 3. **Comparing Friction Levels**: When comparing rough surfaces to smooth surfaces, it is important to note that the rougher the surface, the more resistance there is to motion. This means that rough surfaces will have a higher coefficient of friction. 4. **Conclusion**: Based on the understanding that rough surfaces create more interlocking and resistance compared to smooth surfaces, we conclude that rougher surfaces have **more friction** between them than smoother surfaces. 5. **Final Answer**: Therefore, the correct answer to the question is: Rougher surfaces have **more** friction between them than smoother surfaces. ---
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • FRICTION

    PEARSON IIT JEE FOUNDATION|Exercise Track Your Learning IV|7 Videos

  • FRICTION

    PEARSON IIT JEE FOUNDATION|Exercise Track Your Learning V|5 Videos

  • FRICTION

    PEARSON IIT JEE FOUNDATION|Exercise Track Your Learning II|7 Videos

  • FORCE AND PRESSURE

    PEARSON IIT JEE FOUNDATION|Exercise COMPETITION CORNER |37 Videos

  • HEAT

    PEARSON IIT JEE FOUNDATION|Exercise CONCEPT APPLICATION Level 3 |10 Videos

Similar Questions

Explore conceptually related problems

Frictions between highly smooth surfaces is _________.

Does the friction depend on the smoothness of the surfaces?

Knowledge Check

  • A mass m rests under the action of a force F as shown in the figure-2.158 on a horizontal surface. The coefficient of friction between the mass and the surface is mu . The force of friction between the mass and the surface is :

    A
    `mumg`
    B
    `mu[mg+(F)/(2)]`
    C
    `(Fsqrt(3))/(2)`
    D
    `mu[mg-(F)/(2)]`

  • In the figure, a block of weight 60N is placed on a rough surface. The coefficient of friction between the block and the surface is 0.5 . What should be the weight W such that the block does not slip on the surface?

    A
    `60N`
    B
    `(60)/(sqrt(2)N`
    C
    `30N`
    D
    `(30)/(sqrt(2)N`

  • A force F accelerates a block of mass m on horizontal surface. The coefficient of friction between the contact surface is . The acceleration of m will be -

    A
    `(F-mumg)/M`
    B
    zero
    C
    may be (A) or (B)
    D
    None of these

    • Similar Questions

    Explore conceptually related problems

    _____ friction is friction between moving surfaces.

    Does friction depend on the smoothness of the surface?

    A rectangular block is kept on a rough horizontal surface and given some initial velocity. The coefficient of friction between the block and the surface is constant. The block will topple

    Asseration : A block of mass m starts moving on a rough horizontal surface with a velocity v. It stops due to friction between the block and the surface after moving through a ceratin distance. The surface is now tilted to an angle of 30^@ with the horizontal and same block is made to go up on the surface with the same initial velocity v. The decrease in the mechanical energy in the second situation is small than the first situation. Reason : The coefficient of friction between the block and the surface decreases with the increase in the angle of inclination.

    An object is moving on a plane surface with uniform velocity 10ms^(-1) in presence of a force 10N. The frictional force between the object and the surface is

    Home
    Profile