Home
Class 12
PHYSICS
If radius of earth suddenly contracts by...

If radius of earth suddenly contracts by half of its initial value keeping mass constant, then what will be the time period of rotation of earth about it axis.

A

6hr

B

12hr

C

3hr

D

4hr

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • RACE

    ALLEN|Exercise Basic Maths (GRAVITATION)|25 Videos

  • RACE

    ALLEN|Exercise Basic Maths (Properties of Matter & Fluid Mechanics)(Elasticity)|20 Videos

  • RACE

    ALLEN|Exercise Basic Maths (COLLISION AND CENTRE OF MASS )|12 Videos

  • NEWTONS LAWS OF MOTION

    ALLEN|Exercise EXERCISE-III|28 Videos

  • SIMPLE HARMONIC MOTION

    ALLEN|Exercise Example|1 Videos

Similar Questions

Explore conceptually related problems

The rotation of earth about its axis is

If the speed of rotation of earth about its axis is increased,

If radius of the earth contracts to half of its present value without change in its mass, what will be the new duration of the day?

If the radius of the earth contracts to half of its present value without change in its mass, what will be the new duration of the day?

Satellite having the same orbital period as the period of rotation of the Earth about its own axis is known as :

The sun rotates about its axis once in 27 days. If it suddenly shrinks to one-eighth of its original volume, mass remaining same, then what will be its new period of rotation?

Keeping the mass of the earth as constant, if its radius is reduced to 1/4th of its initial value, then the period of revolution of the earth about its own axis and passing through the centre, (in hours) is (assume the earth to be a solid sphere and its initial period of rotation as 24 h)

ALLEN-RACE-Basic Maths (ROTATIONAL MOTION)
  1. A particle of mass m is moving with constant speed v on the line y=b i...

    Text Solution

    |

  2. A particle is moving along a straight line with increasing speed. Its ...

    Text Solution

    |

  3. If radius of earth suddenly contracts by half of its initial value kee...

    Text Solution

    |

  4. Due to global warming, ice on polar caps is likely to melt in large qu...

    Text Solution

    |

  5. A disc of mass 1 kg and radius 0.1 m is rotating with angular velocity...

    Text Solution

    |

  6. A metre stick is pivoted about its centre. A piece of wax of mass 20 g...

    Text Solution

    |

  7. Two discs of moment of inertia I(1) and I(2) and angular speeds omega(...

    Text Solution

    |

  8. A particle of mass m has been thrown with intial speed u making angle ...

    Text Solution

    |

  9. An angular impulse of 20 Nms is applied to a hollow cylinder of mass 2...

    Text Solution

    |

  10. Choose the correct statement.

    Text Solution

    |

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

    Text Solution

    |

  12. A solid sphere is thrown up a rough incline. The sphere rolls up witho...

    Text Solution

    |

  13. Two solid spheres of different mass, radii and denisty roll down a rou...

    Text Solution

    |

  14. A thin circular ring first slips down a smooth incline then rolls down...

    Text Solution

    |

  15. A solid sphere is rolling without slipping on a level surface dat a co...

    Text Solution

    |

  16. When a body is under pure rolling, the fraction of its total kinetic e...

    Text Solution

    |

  17. When a point mass slips down a smooth incline from top, it reaches the...

    Text Solution

    |

  18. A solid cylinder is rolling down on an inclined plane of angle theta. ...

    Text Solution

    |

  19. A solid sphere rolls on horizontal surface without slipping. What is t...

    Text Solution

    |

  20. Two dises having masses in the ratio 1 : 2 and radii in the ratio 1 : ...

    Text Solution

    |