Home
Class 11
PHYSICS
A particle is confined to rotate in a ci...

A particle is confined to rotate in a circular path decreasing linear speed, then which of the following is correct?

A

`vecL` (angular momentum) is conserved about the centre

B

Only direction of angular momentum `vecL` is conserved

C

It spirals towards the centre

D

Its acceleration is towards the centre

Text Solution

Verified by Experts

The correct Answer is:
B
`|vecL| =mvr`, since `v` is changing (decreasing) `L` is not conserved in magnitude. Since it is given that a particle is confined to rotate in a circular path, it canot have spiral path. Since. The particle has two acceleration `a_(c)` and `a_(t)`, therefore the net acceleration is not towards the centre.

The direction of `vecL` remains the same even when the speed decreases.
Promotional Banner

Topper's Solved these Questions

  • RIGID BODY DYNAMICS 2

    CENGAGE PHYSICS|Exercise MCQ_TYPE|14 Videos

  • RIGID BODY DYNAMICS 2

    CENGAGE PHYSICS|Exercise AR_TYPE|2 Videos

  • RIGID BODY DYNAMICS 2

    CENGAGE PHYSICS|Exercise True/False|4 Videos

  • RIGID BODY DYNAMICS 1

    CENGAGE PHYSICS|Exercise Integer|11 Videos

  • SOUND WAVES AND DOPPLER EFFECT

    CENGAGE PHYSICS|Exercise Integer|16 Videos

Similar Questions

Explore conceptually related problems

A particle moves in circular path with decreasing speed. Which of the following is correct.

A particle is made to move in circular path with decreasing speed. Which of the following is correct ?

A particle is moving in a circular path ofradius rat a constant speed v. Which one of the following graphs correctly represents its acceleration a?

An object moves in a circular path with a constant speed. Which one of the following statements is correct?

If a particle is moving on circular path with uniform speed,then which of the following physical quantity remains constant?

If a particle is moving along a circular path with constant speed, then Its motion is

A particle moves in a circular path with decreasing speed . Choose the correct statement.

A particle is moving on a circular path with constant speed, then its acceleration will be

A particle is moving along a circular path. Which of the following statement is not correct?

CENGAGE PHYSICS-RIGID BODY DYNAMICS 2-SCQ_TYPE
  1. A equilaterial triangle ABC formed from a uniform wire has two small i...

    Text Solution

    |

  2. One quarter sector is cut from a uniform circular disc of radius R. Th...

    Text Solution

    |

  3. A cylinder rolls up an inclined plane, reaches some height, and then r...

    Text Solution

    |

  4. A circular platform is free to rotate in a horizontal plane about a ve...

    Text Solution

    |

  5. Consider a body, shown in figure, consisting of two identical balls, e...

    Text Solution

    |

  6. A particle undergoes uniform circular motion. About which point on the...

    Text Solution

    |

  7. A horizonral circular plate is rotating about a vertical axis passing ...

    Text Solution

    |

  8. A disc is rolling (without slipping) on a horizontal surface. C is its...

    Text Solution

    |

  9. A block of mass m is at rest under the action of force F against a wal...

    Text Solution

    |

  10. From a circular disc of radius R and mass 9 M , a small disc of radius...

    Text Solution

    |

  11. A particle is confined to rotate in a circular path decreasing linear ...

    Text Solution

    |

  12. A solid sphere of mass M, radius R and having moment of inertia about ...

    Text Solution

    |

  13. A small object of uniform density rolls up a curved surface with an i...

    Text Solution

    |

  14. If the resultant of all the external forces acting on a system of part...

    Text Solution

    |

  15. A block of base 10cmxx10cm and height 15cm is kept on an inclined plan...

    Text Solution

    |

  16. A thin ring of mass 2kg and radius 0.5 m is rolling without on a horiz...

    Text Solution

    |

  17. A thin uniform rod, pivoted at O, is rotating in the horizontal plane ...

    Text Solution

    |

  18. A small mass m is attached to a massless string whose other end is fi...

    Text Solution

    |

  19. Two identical discs of same radius R are rotating about their axes in ...

    Text Solution

    |

  20. Two solid cylinders P and Q of same mass and same radius start rolling...

    Text Solution

    |