Home
Class 11
PHYSICS
A body of mass 1.0 kg is rotaing on a ci...

A body of mass 1.0 kg is rotaing on a circular path of diameter 2.0 m at the rate of 10 rotations in 31.4 s. calculate (i) angular momentum of the body and (ii) rotational kinetic energy.

Text Solution

Verified by Experts

The correct Answer is:
(i) `2.0 kgm^(2) s^(-1)` (ii) `2.0 J`
Promotional Banner

Topper's Solved these Questions

  • ROTATIONAL MOTION

    SL ARORA|Exercise Problem|24 Videos
  • PROPERTIES OF SOLIDS

    SL ARORA|Exercise All Questions|97 Videos
  • System of particles & rotational Motion

    SL ARORA|Exercise EXERCISE|353 Videos

Similar Questions

Explore conceptually related problems

A body of mass 1.0 kg is rotating on a circular path of diameter 2.0 m at the rate of 10 rotations in 31.4 s. angular momentum of the body is?

A body of mass 2 kg is revolving in a horizontal circle of radius 2 m at the rate of 2 revolutions per second. Determine (i) moment of inertia of the body and (ii) the rotational kinetic energy of the body.

A particle of mass 0.5kg is rotating in a circular path of radius 2m and centripetal force on it is 9 Newtons Its angular momentum (in J-sec)

A particle of mass 0.5kg is rotating in a circular path of radius 2m and centripetal force on it is 9 Newtons. Its angular momentum (in J-sec) is:

Calculate the rotational kinetic energy of a body of mass 2 kg rotating on a circular path of diameter 4 m at the rate of 50 rotations in 20 seconds.

A ring of diameter 0.4 m and of mass 10 kg is rotating about its axis at the rate 2100 rpm. Find (i) moment of inertia (ii) angular momentum and (iii) rotational K.E. of the ring.

A ring of diameter 0.4 m and of mass 10 kg is rotating about its axis at the rate of 2100 rpm. Calculate moment of inertia, angular momentum and rotational KE of the ring.

A body of mass 2 kg is rotating on a circular path of radius 0.5 m, with an angular velocity of 20 rad/s. If the radius of the path is doubled, then the new angular velocity will be

SL ARORA-ROTATIONAL MOTION-Problem for self practice
  1. A grindstone has a moment of inertia of 50 kg m^(2). A constant couple...

    Text Solution

    |

  2. A flywheel of moment of inertia 10^(7) g cm^(2) is rotating at a speed...

    Text Solution

    |

  3. If a constant torque of 500 Nm turns a wheel of moment of inertia 100 ...

    Text Solution

    |

  4. A sphere of mass 2 kg and radius 5 cm is rotating at the rate of 300 r...

    Text Solution

    |

  5. Determine the angular momentum of a car of mass 1500 kg moving in a ci...

    Text Solution

    |

  6. A body of mass 1.0 kg is rotaing on a circular path of diameter 2.0 m ...

    Text Solution

    |

  7. Mass of an electron is 9.0xx10^(-31) kg. It revolves around the nucleu...

    Text Solution

    |

  8. A circular ring of diameter 40 cm and mass 1 kg rotating about an axis...

    Text Solution

    |

  9. An ice skater spins with arms outstreched at 1.9 rps. Her moment of in...

    Text Solution

    |

  10. A mass of 2 kg is rotating on a circular path of radius 0.8 m with ang...

    Text Solution

    |

  11. A ball tied to a string takes us to complete revolution along a horizo...

    Text Solution

    |

  12. The sun rotates round itself once in 27 days. What will be period of r...

    Text Solution

    |

  13. If the earth suddenly contracts by one-fourth of its present radius, b...

    Text Solution

    |

  14. Prove that for an earth satellite, the ratio of its velocity at apogee...

    Text Solution

    |

  15. A uniform disc rotating freely about a vertical axis makes 90 revoluti...

    Text Solution

    |

  16. A horizontal disc rotating about a vertical axis makes 100 revolutions...

    Text Solution

    |

  17. A body of mass 2 kg is attached to a weightless string wound round a c...

    Text Solution

    |

  18. A solid cylinder of mass 10 kg is rolling perfectly on a plane of incl...

    Text Solution

    |

  19. A solid cylinder of mass 8 kg and radius 50 cm is rolling down a plane...

    Text Solution

    |

  20. If a sphere rolls (starting from rest) in 5.3 s along a plane 1m in l...

    Text Solution

    |