Home
Class 11
PHYSICS
A horizontal platform is rotating with u...

A horizontal platform is rotating with uniform angular velocityy about an vertical axis passing through its centre.At some instant of time,a viscous floud of mass m i s dropped at its centre and is allowed to spread out and finally fall,The angular velocity during this period:

A

decreases continously

B

decreases initially and then increases

C

remains unaltered

D

inceraes continously.

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • MOTION OF SYSTEM OF PARTICLES AND RIGID BODY

    JBD PUBLICATION|Exercise EXAMPLE|100 Videos

  • MODEL TEST PAPER-06

    JBD PUBLICATION|Exercise EXERCISE|37 Videos

  • Oscillations and Waves

    JBD PUBLICATION|Exercise EXAMPLE|97 Videos

Similar Questions

Explore conceptually related problems

A closed tube, partly filled with a liqyid and set horizontal, is rotated about a vertical axis passing through its centre. IN the process, the moment of inertia of the system about its axis would

Calculate the radius of gyration of a rod of mass 100 g and length 100 m about an axis passing through is centre of gravity and perpendicular to its length.

Two particles , each of mass m and charge q, are attached to the two ends of a light rigid rod of length 2 R . The rod is rotated at constant angular speed about a perpendicular axis passing through its centre. The ratio of the magnitudes of the magnetic moment of the system and its angular momentum about the centre of the rod

A disc of radius R is rotating with an angular speed omega_0 about a horizontal axis. it is placed on a horizontal table. The coefficient of kinetic friction is mu_k . What was the velocity of its centre of mass before being brought in contact with the table?

A 1.0 m long metallic rod is rotated with an angular frequency of 400 rad s^-1 about an axis normal to the rod passing through its one end. The other end of the rod is in contact with a circular metallic ring. A constant and uniform magnetic field of 0.5 T parallel to the axis exists everywhere. Calculate the emf developed between the centre and the ring.

A disc of radius R is rotating with an angular speed omega_0 about a horizontal axis. it is placed on a horizontal table. The coefficient of kinetic friction is mu_k . Which force is responsible for the effects in what happens to the linear velocity of a point on its rim when placed in contact with the table? and What happens to the linear speed of the centre of mass when disc is placed in contact with the table?

JBD PUBLICATION-MOTION OF SYSTEM OF PARTICLES AND RIGID BODY-EXAMPLE
  1. A horizontal platform is rotating with uniform angular velocityy about...

    Text Solution

    |

  2. A body is rotating, it is necessary being acted upon by an exteral tor...

    Text Solution

    |

  3. What is the position vector of centre of mass of two particles of equa...

    Text Solution

    |

  4. A heavenly body revolves around a massive star in a highly elliptical ...

    Text Solution

    |

  5. Where does centre of mass of a triangular lamina lie?

    Text Solution

    |

  6. Is the angular momentum a scalar quantity ?State its unit.

    Text Solution

    |

  7. What is the direction of angular momentum of a body?

    Text Solution

    |

  8. Is centre of mass a reality?

    Text Solution

    |

  9. Which points on a cylinder rolling over a surface move rectilinearly ?

    Text Solution

    |

  10. A shell fired from a gun explodes into pieces in air .How is the centr...

    Text Solution

    |

  11. A ballet-dancer stretches her hands out for slowing down.What principl...

    Text Solution

    |

  12. Under what conditions angular momentum of a moving body is zero?

    Text Solution

    |

  13. Three identical spheres each of radius R are placed touching each ooth...

    Text Solution

    |

  14. Center of mass of a body always lies at a point, where there is no mas...

    Text Solution

    |

  15. Does the angular momentum of an eletron remain consered when the elect...

    Text Solution

    |

  16. What is an isolated system?

    Text Solution

    |

  17. Define centre of mass.

    Text Solution

    |

  18. What is rotational analogue of mass?

    Text Solution

    |

  19. Is radius of gyration of a body a constant quantity?

    Text Solution

    |

  20. About which axis is moment of inertia of cube minimum?

    Text Solution

    |

  21. Find the expression for moment of inertia of a thin uniform rod abou...

    Text Solution

    |