Home
Class 11
PHYSICS
The upper half of an in clin ed plane of...

The upper half of an in clin ed plane of inclination `30^(@)` is perfectly smooth, while the lower half is rough. A block starts from rest from the top of the plane and if it comes back to rest at the bottom, what is the co-efficient of kinetic friction between the surface of block and the rough surface of the inclined plane ?

A

2

B

`2sqrt(3)`

C

`(2)/sqrt(3)`

D

`sqrt(3)`

Text Solution

Verified by Experts

The correct Answer is:
C
According to Textual Exercise Section - B same as Sum No.9
Promotional Banner

Topper's Solved these Questions

  • LAW OF MOTION

    KUMAR PRAKASHAN|Exercise SECTION-F (QUESTIONS FROM MODULE)|22 Videos

  • LAW OF MOTION

    KUMAR PRAKASHAN|Exercise (QUESTION PAPER) SECTION-A|5 Videos

  • LAW OF MOTION

    KUMAR PRAKASHAN|Exercise SECTION-D(NCERT EXEMPLAR SOLUTIONS)|42 Videos

  • GRAVITATION

    KUMAR PRAKASHAN|Exercise QUESTIONS PAPER Section - D|1 Videos

  • MACHANICAL PROPERTIES OF SOLIDS

    KUMAR PRAKASHAN|Exercise QUESTION PAPER|11 Videos
KUMAR PRAKASHAN-LAW OF MOTION-SECTION -E(MULTIPLE CHOICE QUESTIONS) (MCQS)
  1. A bomb in the steady state explodes into three fragments. Two fragm en...

    Text Solution

    |

  2. Block of mass m is placed on frictionless slope with angle 0. Normal f...

    Text Solution

    |

  3. The upper half of an in clin ed plane of inclination 30^(@) is perfect...

    Text Solution

    |

  4. When a force acts on a body of mass 0.1 kg, the change in its velocity...

    Text Solution

    |

  5. A force of 8 N acts on an object of mass 2 kg in X-direction and anoth...

    Text Solution

    |

  6. Three blocks with masses m, 2m and 3m are connected by strings as show...

    Text Solution

    |

  7. A rod PQ of mass M and length L is hinged at end P. The rod is kept ho...

    Text Solution

    |

  8. An explosion breaks a rock into three parts in a horizontal plane. Two...

    Text Solution

    |

  9. The u p p er half of an in clin ed p lane of inclination theta is perf...

    Text Solution

    |

  10. A system consists of three masses m(1) m(2) and m(3) connected by a st...

    Text Solution

    |

  11. The force ‘F’ acting on a particle o f mass ‘m ’ is indicated by the f...

    Text Solution

    |

  12. A ballon with mass 'm’ is descending down with an acceleration ‘a' (wh...

    Text Solution

    |

  13. A body of m ass (4m) is lying x-y p lan e at rest. It su d d en ly ex...

    Text Solution

    |

  14. Three blocks A, B and C of m asses 4kg, 2kg and lkg respectively are i...

    Text Solution

    |

  15. A block A of m ass rests on a horizontal table. A lig h t strin g conn...

    Text Solution

    |

  16. A plank w ith a box on it atone end is gradually raised about the othe...

    Text Solution

    |

  17. A particle moves so th at its p o sitio n vector is omega Where is a...

    Text Solution

    |

  18. What is the minimum velocity with which a body of mass m must enter a ...

    Text Solution

    |

  19. A rigid ball of mass m strikes a rigid wall at 60° and gets reflected...

    Text Solution

    |

  20. A bullet of m ass 10 g m oving horizontal w ith a velocity of 400 ms^(...

    Text Solution

    |