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
Promotional Banner

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

Force of friction is a

Define angle of friction.

How friction is reduced ?

Friction can be

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 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 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.

MBD PUBLICATION-FRICTION-QUISTION BANK
  1. Is it reasonable to expect the coefficient of friction to exceed unity...

    Text Solution

    |

  2. It is known that polishing a surface beyond a certain limit increases ...

    Text Solution

    |

  3. Why do we slip on a muddy road ?

    Text Solution

    |

  4. State whether the following assertion is true or false : When a person...

    Text Solution

    |

  5. Is a large brake on a bicycle wheel more effective than a small one ?

    Text Solution

    |

  6. Why are vehicles provided with wheels and- ball bearing ?

    Text Solution

    |

  7. Comment on the statement ‘friction is necessary evil’.

    Text Solution

    |

  8. It is easier to than push.

    Text Solution

    |

  9. How does a lubricant help in decreasing friction ?

    Text Solution

    |

  10. To slide a heavy box, we generally left it a bit to place a metallic p...

    Text Solution

    |

  11. Why has a horse to pull a cart harder during the first few steps of hi...

    Text Solution

    |

  12. How do we save petrol when the tyres of the motor cycle are fully infl...

    Text Solution

    |

  13. Write down the dimensional formula of force of friction

    Text Solution

    |

  14. Write down the mathematical expression for coefficient of static frict...

    Text Solution

    |

  15. Write down the mathematical expression for coefficient of kinetic fric...

    Text Solution

    |

  16. Write down the mathematical expression for coefficient of static frict...

    Text Solution

    |

  17. What is the slope of the graph attained by plotting of dynamic frictio...

    Text Solution

    |

  18. What is static friction ?

    Text Solution

    |

  19. What is kinetic friction ?

    Text Solution

    |

  20. Discuss the statement “friction is a necessary evil”.

    Text Solution

    |