Home
Class 12
PHYSICS
Is it reasonable to expect the coefficie...

Is it reasonable to expect the coefficient of friction to exceed unity ?

Text Solution

Verified by Experts

For normal plane surfaces the coefficient of friction is less than unity But, when the surface are so irregular that sharp minute projections and cavities exist in the surfaces, the coefficient of friction may be greater than one
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • FRICTION

    MBD PUBLICATION|Exercise QUISTION BANK|72 Videos

  • ELECTROMAGNETIC WAVES

    MBD PUBLICATION|Exercise QUESTION BANK|180 Videos

  • GRAVITATION

    MBD PUBLICATION|Exercise QUESTION BANK|219 Videos

Similar Questions

Explore conceptually related problems

Define angle of friction.

How friction is reduced ?

Knowledge Check

  • Force of friction is a

    A
    necessary
    B
    evil force
    C
    necessary evil force
    D
    negative force

  • Friction can be

    A
    completely avoided
    B
    minimised
    C
    cannot be minimised
    D
    of conservative nature

  • A block placed on a horizontal surface is being pushed by a force F making an angle theta with the vertical. The coefficient of friction between the block and surface is mu The force required to slide down the block with uniform velocity on the floor is

    A
    `(mumg)/(sintheta-mucostheta)`
    B
    `(sintheta-mucostheta)/(mumg)`
    C
    `mumg`
    D
    None of these

    • Similar Questions

    Explore conceptually related problems

    If the coefficient of friction is √3 , the angle of friction:

    How coefficient of friction and angle of repose are related ?

    Explain how a body will move up in an incline with uniform velocity if the co.efficient of friction of the inclined plane is μ and the, angle of inclination of the plane to the horizontal is 'θ'

    A mass of 4 kg rests on a horizontal plane. The plane is gradually inclined until an angle theta=15^@ with the horizontal and the mass begins to slide. What is the coefficient of static friction between the block and the surface ?

    Explain why a car travelling on a level road with coefficient of friction p. can never have an acceleration greater ±an pig.

    Home
    Profile