Home
Class 12
PHYSICS
A particle of mass M and radius of gyrat...

A particle of mass M and radius of gyration K is rotating with angular acceleration `alpha`. The torque acting on the particle is

A

`1/2 MK^(2)alpha`

B

`MK^(2) alpha`

C

`(MK^(2))/(alpha)`

D

`1/4 M K^(2) alpha^(2)`

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • QUESTION PAPER 2019

    TARGET PUBLICATION|Exercise MCQ|45 Videos

  • SEMICONDUCTORS

    TARGET PUBLICATION|Exercise Evaluation Test|17 Videos

Similar Questions

Explore conceptually related problems

If a body of mass 'm' and radius of gyration K rotates with angular velocity omega , then the angular momentum of the body will be

A body of mass m and radius of gyration K has an angular momentum L. Then its angular velocity is

Prove that the rate of change of angular momentum is equal to torque acting on the particle

A torque tau applied to a dise of mass 2 kg and radius of gyration 15 cm produces an angular acceleration of 5 "rad"//sec^(2) . Find the value of tau .

A flywheelm of mass 150 kg and radius of gyration 3 m is rotated with a speed of 480 rpm. Find the torque required to stop it in 7 rotations.

Obtain an expressing for torque acting on a body rotating with uniform angular acceleration.

A particle is at a distance r from the axis of rotation. A given torque tau produces some angular acceleration in it. If the mass of the particle is doubled and its distance from the axis is halved, the value of torque to produce the same angular acceleration is -

Two masses are attached to a rod end to end . If torque is applied they rotate with angular acceleration alpha . If their distances are doubled and same torque is applied, then they move with angular acceleration.

Starting from rest, a particle rotates in a circle of radius R  2 m with an angular acceleration  = /4 rad/s2.The magnitude of average velocity of the particle over the time it rotates quarter circle is:

TARGET PUBLICATION-ROTATIONAL MOTION -MCQ
  1. Let vecF be the force acitng on a paritcle having positon vector vecr...

    Text Solution

    |

  2. The dimensions of torque are the same as that of

    Text Solution

    |

  3. A particle of mass M and radius of gyration K is rotating with angular...

    Text Solution

    |

  4. The moment of inertia of a body is 2.5 kg m^(2). Calculate the torque ...

    Text Solution

    |

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

    Text Solution

    |

  6. A torque of magnitude 2000 Nm acting on a body produces an angular acc...

    Text Solution

    |

  7. A fly wheel of M.I. 0.32 kg m^(2) is rotated steadily at 120 rad/s by ...

    Text Solution

    |

  8. A motor rotates at a constant speed of 25 rev/s. The power delivered b...

    Text Solution

    |

  9. A sphere cannot roll on

    Text Solution

    |

  10. Which of the following conditions is true for a rigid body rolling wit...

    Text Solution

    |

  11. A solid sphere of mass 10 kg and diameter 5 cm rolls without slipping ...

    Text Solution

    |

  12. A solid sphere at the top of an inclined plane 0.6 m high is released ...

    Text Solution

    |

  13. A thin uniform circular ring is rolling down an inclined plane of incl...

    Text Solution

    |

  14. Which of the following statements is true in case of the principle of ...

    Text Solution

    |

  15. State and prove theorem of perpendicular axes.

    Text Solution

    |

  16. State and prove theorem of parallel axes.

    Text Solution

    |

  17. M.I. of a thin uniform circular disc about one of the diameters is I. ...

    Text Solution

    |

  18. The moment of inertia of a circular loop of radius R, at a distance of...

    Text Solution

    |

  19. A solid cylinder of mass M and radius R rolls without slipping on a fl...

    Text Solution

    |

  20. The moment of inertia of a cylinder of radius R, length L and mass M a...

    Text Solution

    |