Home
Class 11
PHYSICS
barF=abari+3barj+6bark and barr=2bari-6b...

`barF=abari+3barj+6bark` and `barr=2bari-6barj-12bark`. The value of 'a' for which the angular momentum is conserved is

A

`-1`

B

`0`

C

`1`

D

`2`

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • SYSTEM OF PARTICLES AND ROTATIONAL MOTION

    AAKASH SERIES|Exercise Exercise-II|109 Videos

  • SURFACE TENSION

    AAKASH SERIES|Exercise ADDITIONAL PRACTICE EXERCISE (PRACTICE SHEET (ADVANCED) INTEGER TYPE QUESTIONS )|8 Videos

  • THERMAL PROPERTIES OF MATTER

    AAKASH SERIES|Exercise ADDITIONAL PRACTICE EXERCISE (LEVEL - II) PRACTICE SHEET (ADVANCED) Integer/Subjective Type Questions|2 Videos

Similar Questions

Explore conceptually related problems

[bari-barj bark]+[-bari-barj bark]+[bari-bark bark] =

If bara=2bari+barj-3bark, barb=3barj-2barj-bark then find the angle between .

(bari-barj) xx (barj-bark).(bark-bari) =

If bara=bari+barj+bark,bara.barb=1,baraxxbarb=2bari+barj-3bark then 3barb=

If bara=3bari+2barj+bark,barb=bari+barj+2bark and barc=bari+3barj+3bark then then the angle between bara and the plane containing the face determined by barb and barc is

AAKASH SERIES-SYSTEM OF PARTICLES AND ROTATIONAL MOTION-PRACTICE EXERCISE
  1. A dancer spins about a vertical axis at 60 rpm with her arms folded. I...

    Text Solution

    |

  2. Two identical disc are placed one over the other and both are rotating...

    Text Solution

    |

  3. barF=abari+3barj+6bark and barr=2bari-6barj-12bark. The value of 'a' f...

    Text Solution

    |

  4. If earth shrinks to 1//64 of its volume with mass remaining same durat...

    Text Solution

    |

  5. Two wheels of M.I. 3kgm^(2) and 5kgm^(2) are rotating at a rate of 600...

    Text Solution

    |

  6. A mass is whirled in a circular path with a constant angular velocity ...

    Text Solution

    |

  7. A square plate of moment of inertia 'I' is pivoted at its centre. It h...

    Text Solution

    |

  8. A flywheel of M.I. 6xx10^(-2)kgm^(2) is rotating with an angular veloc...

    Text Solution

    |

  9. When 200J of work is done on a fly wheel its frequency of rotation inc...

    Text Solution

    |

  10. The shaft of a motar is making 1260 RPM. The torque supplied by the mo...

    Text Solution

    |

  11. A solid sphere is rotating with an angular velocity omega. It is of mo...

    Text Solution

    |

  12. The moment of inertia of a wheel of radius 20cm is 40kgm^(2). If a tan...

    Text Solution

    |

  13. A thin rod of mass 'm' and length 2L is made to rotate about a normal ...

    Text Solution

    |

  14. The M.I. of a body is 1.2kgm^(2). Initially the body is at rest. In or...

    Text Solution

    |

  15. A uniform solid sphere of diameter 0.2m and mass 10kg is rotated about...

    Text Solution

    |

  16. If the K.E. of a rotating body about an axis is decreased by 36%, its ...

    Text Solution

    |

  17. A constant torque acting on a uniform circular wheel changes its angul...

    Text Solution

    |

  18. A solid sphere and a hallow sphere of same mass and radius rotate abou...

    Text Solution

    |

  19. For the arrangement shown in the figure, tension in the string is

    Text Solution

    |

  20. A ring is allowed to roll down on an incline of 1 in 10 without slippi...

    Text Solution

    |