Home
Class 11
PHYSICS
A smooth block is released at rest on a ...

A smooth block is released at rest on a `45^@` incline and then slides a distance 'd'. The time taken to slide is 'n' times as much to slide on rough incline than on a smooth incline. The coefficient of friction is

A

`mu_k=1-frac(1)(n^2)`

B

`mu_k=sqrt(1-frac(1)(n^2)`

C

`mu_s=1-frac(1)(n^2)`

D

`mu_s=sqrt(1-frac(1)(n^2)`

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • Laws of Motion

    SL ARORA|Exercise Exercise|627 Videos

  • Kinetic Theory of gases

    SL ARORA|Exercise Example|47 Videos

  • LAWS OF MOTION : FRICTION

    SL ARORA|Exercise Self Practice|95 Videos

Similar Questions

Explore conceptually related problems

A smooth block is released at rest on a 45^(@) inclined and then slides a distance d. the time taken to slide is n times as much to slide on rough incline then on a smooth incline of same inclination. The coefficient of friction fo rough incline.

A body weighing 20 kg just slides down a rough inclined plane that rises 5 in 12. The coefficient of friction is

A block is released from rest from point on a rough inclined place of inclination 37^(@). The coefficient of friction is 0.5.

A block takes a twice as much time to slide down a 45^(@) rough inclined plane as it takes to slide down a similar smooth , plane . The coefficient of friction is :

A block of mas m begins to slide down on an inclined plane of inclination theta . The force of friction will be

SL ARORA-Laws of Motion-Exercise
  1. A horizontal force of 10N is necessary to just hold a block stationary...

    Text Solution

    |

  2. The upper half of an inclined plane with inclination phi is perfectly ...

    Text Solution

    |

  3. A smooth block is released at rest on a 45^@ incline and then slides a...

    Text Solution

    |

  4. Given in figure are two blocks A and B of weight 20N and 100N, respect...

    Text Solution

    |

  5. A block weighing 10kg is at rest on a horizontal table. The coefficien...

    Text Solution

    |

  6. A block of mass 'm' is placed on a rough surface with a vertical cross...

    Text Solution

    |

  7. A particle is acted upon by a force of constant magnitude which is alw...

    Text Solution

    |

  8. An annular ring with inner and outer radii R1 and R2 is rolling wihtou...

    Text Solution

    |

  9. The maximum velocity (in ms^(-1)) with which a car driver must travers...

    Text Solution

    |

  10. A rocket is fired vertically from the earth with an acceleration of 2g...

    Text Solution

    |

  11. Two moasses m(1)=5kg and m(2)=10kg, connected by an inextensible strin...

    Text Solution

    |

  12. The position-time graph of a particle of mass 0.1 kg is shown. The imp...

    Text Solution

    |

  13. A gun fires a bullet of mass 50 g with a velociy of 30 m//s. Due to t...

    Text Solution

    |

  14. A body of mass M moving with velocity V explodes into two equal parts....

    Text Solution

    |

  15. A body of mass 0.25 kg is projected with muzzle velocity 100 ms^(-1) f...

    Text Solution

    |

  16. A bullet is fired fram a riffie . If the rifle recoils freely determi...

    Text Solution

    |

  17. A boy of mass m stands on one end of a wooden plank of length L and ma...

    Text Solution

    |

  18. Rocket engines lift a rocket from the earth surface because hot gas wi...

    Text Solution

    |

  19. The motion of a rocket is based on the principle of conservation of

    Text Solution

    |

  20. A rocket with a lift-off mass 3.5xx10^4 kg is blasted upwards with an ...

    Text Solution

    |