Home
Class 11
PHYSICS
The K.E. of a body rotating at 300 rpm i...

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

A

1 Js

B

2 Js

C

4 Js

D

8Js

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • SYSTEM OF PARTICLES AND ROTATIONAL MOTION

    AAKASH SERIES|Exercise EXERCISE-II ( Rolling Motion : )|16 Videos

  • SYSTEM OF PARTICLES AND ROTATIONAL MOTION

    AAKASH SERIES|Exercise PRACTICE EXERCISE (Centre of mass )|39 Videos

  • SYSTEM OF PARTICLES AND ROTATIONAL MOTION

    AAKASH SERIES|Exercise EXERCISE-II (Conservation of Angular momentum)|12 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

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

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

(A) : When there is no external torque moment of inertia of a rotating body changes, its angular momentum remain conserved, but its kinetic energy changes. (R ) : Angular momentum does not depend upon moment of inertia of the body.

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)

AAKASH SERIES-SYSTEM OF PARTICLES AND ROTATIONAL MOTION-EXERCISE-II ( Rotational Dynamics )
  1. A uniform circular disc of radius 50cm at rest is free to turn about a...

    Text Solution

    |

  2. The handle of a door is at a distance 40cm from axis of rotation. If a...

    Text Solution

    |

  3. A particle of mass m is projected with an initial velocity u at an ang...

    Text Solution

    |

  4. A constant torque of 1000 Nm turns a wheel of of M.I 200kg m^(2) about...

    Text Solution

    |

  5. If 484 J of energy is spent in increasing the speed of a wheel from 60...

    Text Solution

    |

  6. A shaft rotating at 3000 rpm is transmitting a power of 3.14 KW. The m...

    Text Solution

    |

  7. A wheel rotating at an angular speed of 20 rads^(-1), is brought to re...

    Text Solution

    |

  8. A thin uniform rod of length / and mass m is swinging freely about a h...

    Text Solution

    |

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

    Text Solution

    |

  10. If the velocity of a rotating body of mass 50 kg is given by barV=3bar...

    Text Solution

    |

  11. If the Earth shrinks such that its density becomes 8 times to the pres...

    Text Solution

    |

  12. A point sized sphere of mass .m. is suspended from a point using a str...

    Text Solution

    |

  13. Two rigid bodies have same angular momentum about their axes of symmet...

    Text Solution

    |

  14. One end of a uniform rod of mass m and length / is clamped. The rod li...

    Text Solution

    |

  15. A cubical block of mass M and edge a slides down a rough inclined plan...

    Text Solution

    |

  16. A particle of mass m is moving yz- plane with a uniform velocity v wit...

    Text Solution

    |

  17. A wheel which is initially at rest is subjected to a constant angular ...

    Text Solution

    |

  18. A car is negotiating a curved road of radius R. The road is banked at ...

    Text Solution

    |

  19. A solid cylinder of mass 50kg and radius 0.5m is tree to rotate about ...

    Text Solution

    |