Home
Class 11
PHYSICS
If the K.E. of a rotating body about an ...

If the K.E. of a rotating body about an axis is decreased by `36%`, its angular momentum about that axis

A

increases by `72%`

B

decreases by `72%`

C

increases by `20%`

D

decreases by `20%`

Text Solution

Verified by Experts

The correct Answer is:
D
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

A thin rotates about an axis passing through its centre and perpendicular to its plane with a constant angular velocity .omega. I is the moment of inertia of that disc and .L. is its angular momentum about the given axis. Then rotational kinetic energy of the disc .E. is (A) E alpha L^(2) (B) E alpha L^(-2) (C ) E alpha I (D) E alpha I^(-1) (if L constant)

The diameter of a flywheel is 1 m. It has a mass of 20 kg. It is rotating about its axis with a speed of 120 rotations in 1 min. Its angular momentum in kg-m^(2)s^(-1)is

A solid cylinder of mass 20 kg rotates about its axis with angular speed 100 rad s^(-1) . The radius of the cylinder is 0.25 m. What is the kinetic energy associated with the rotation of the cylinder? What is the magnitude of angular momentum of the cylinder about its axis?

The K.E. of a body rotating at 300 rpm is 62.8 J. Its angular momentum is

AAKASH SERIES-SYSTEM OF PARTICLES AND ROTATIONAL MOTION-PRACTICE EXERCISE
  1. A mass is whirled in a circular path with a constant angular velocity ...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  16. A cylinder is released from rest from the top of an incline of inclina...

    Text Solution

    |

  17. For a body rolling along a level surface, without slipping the transla...

    Text Solution

    |

  18. A solid sphere and a spherical shell roll down an incline from rest fr...

    Text Solution

    |

  19. When a solid sphere is rolling along level surface the percentage of i...

    Text Solution

    |

  20. A solid sphere of radius 'r' is rolling on a horizontal surface. The r...

    Text Solution

    |