Home
Class 11
PHYSICS
A circular disc is rotating about its ow...

A circular disc is rotating about its own axis at a uniform angular velocity . `omega`. The disc is subjected to uniform angular retardation by which its angular oo velocity is decreased to `omega/2` during 120 rotations. The number of rotations further made by it before coming to rest is:

A

120

B

60

C

40

D

20

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • APPENDICES

    AAKASH SERIES|Exercise SYSTEM OF PARTICLES AND ROTATIONAL MOTION (ROLLING MOTION)|9 Videos

  • APPENDICES

    AAKASH SERIES|Exercise SYSTEM OF PARTICLES AND ROTATIONAL MOTION (EQUILIBRIUM OF BODY & PARALLEL FORCES)|6 Videos

  • APPENDICES

    AAKASH SERIES|Exercise SYSTEM OF PARTICLES AND ROTATIONAL MOTION (CONSERVATION OF ANGULAR MOMENTUM)|7 Videos

  • CALORIMETRY

    AAKASH SERIES|Exercise ADDITIONAL PRACTICE EXERCISE (LEVEL - II) (LECTURE SHEET (ADVANCED)(Matrix Type Questions)|1 Videos

Similar Questions

Explore conceptually related problems

A circular disc is rotating about its own axis at uniform angular velocity omega . The disc is subjected to uniform angular retardation by which its angular velocity is decreased to omega//2 during 120 rotations., The number of rotations further made by it before coming to rest is

A ceiling fan is rotating about its own axis with uniform angular velocity omega . The electric current is switched off then due to constant opposing torque its angular velocity is reduced to 2omega//3 as it completes 30 rotations. The number of rotations further it makes before coming to rest is

A circular disc is rotating about its own axis at an angular velocity omega . If P is exact midpoint of dise between axis and rim of disc then angular velocity of Pis

A fly wheel is rotating about its own axis at an angular velocity 11 rads^(-1) , its angular velocity in revolution per minute is

When a disc rotates with uniform angular velocity, which of the following is not true ?

A stationary wheel starts rotating about its own axis at uniform angular acceleration 8 rad//s^(2) . The time taken by it complete 77 rotation is

AAKASH SERIES-APPENDICES -SYSTEM OF PARTICLES AND ROTATIONAL MOTION (ROTATIONAL DYNAMICS)
  1. A circular disc is rotating about its own axis at a uniform angular ve...

    Text Solution

    |

  2. A constant power is supplied to a rotating disc. The relationship of a...

    Text Solution

    |

  3. Reel of thread in the form of solid cylinder is allowed to unroll by h...

    Text Solution

    |

  4. A cylinder of mass M and radius R starts falling under gravity at t = ...

    Text Solution

    |

  5. A particle performs uniform circular motion with an angular momentum L...

    Text Solution

    |

  6. A particle of mass 2 kg is on a smooth horizontal table and moves in a...

    Text Solution

    |

  7. A wheel of radius 0.4 m can rotated freely about its axis as shown in ...

    Text Solution

    |

  8. A wheel of radius 20 cm can rotate about its centre. A string is wrapp...

    Text Solution

    |

  9. A uniform rod of length I and mass m is suspended by two vertical inex...

    Text Solution

    |

  10. A heavy wheel of radius 20 cm and weight 10kg is to be dragged over a ...

    Text Solution

    |

  11. A cubical block of side .L. rests on a rough horizontal surface with c...

    Text Solution

    |

  12. As shown in figure, a stick half of which is made of wood and other ha...

    Text Solution

    |

  13. Same torque is applied on a solid cylinder and solid sphere with same ...

    Text Solution

    |

  14. A bullet of mass 10 g and speed 500 m/s is fired into a door and gets ...

    Text Solution

    |

  15. A particle P is moving uniformly along a straight line XX with a speed...

    Text Solution

    |

  16. A rod of length / is held vertically stationary with its lower end loc...

    Text Solution

    |

  17. A string is wrapped around a wheel of radius .r.. The axis of the whee...

    Text Solution

    |

  18. A disc rotating with an angular velocity omega(0). A constant retardin...

    Text Solution

    |

  19. An equilateral prism of mass m rests on a rough horizontal surface wit...

    Text Solution

    |

  20. A cube of mass.m. and side .a. moving along with a constant speed v0 a...

    Text Solution

    |