Home
Class 12
PHYSICS
Two identical discs are positioned on a ...

Two identical discs are positioned on a vertical axis as shown in the figure. The bottom disc is rotating at angular velocity `omega_(0)` and has rotational kinetic energy `K_(0)`.The top disc is initially at rest. It then falls and sticks to the bottom disc. The change in the rotational kinetic energy of the system is

A

`k_(@)//6`

B

`-(1//2)k_(@)`

C

`-(1//4)k_(@)`

D

`k_(@)//8`

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • TEST PAPERS

    RESONANCE ENGLISH|Exercise PHYSICS|784 Videos

  • TEST PAPERS

    RESONANCE ENGLISH|Exercise PART - II PHYSICS SEC - 2|20 Videos

  • SIMPLE HARMONIC MOTION

    RESONANCE ENGLISH|Exercise Advanced Level Problems|13 Videos

  • TEST SERIES

    RESONANCE ENGLISH|Exercise PHYSICS|130 Videos

Similar Questions

Explore conceptually related problems

A disc is rotating with angular velocity omega . If a child sits on it, what is conserved?

A solid disc is rolling without slipping on a horizontal ground as shown in figure. Its total kinetic energy is 100 J. what is its translational and rotational kinetic energy?

A disc is rolling on a surface without slipping. What is the ratio of its translational to rotational kinetic energies ?

A disc is rolling without slipping. The ratio of its rotational kinetic energy and translational kinetic energy would be -

Two uniform circular rough disc of moment of inertia I_(1) and (I_(1))/(2) are rotating with angular velocity omega_(1) and (omega_(1))/(2) respectively in same direction. Now one disc is placed the other disc co-axially. The change in kinetic energy of the system is :

A disc is rotaing with an angular velocity omega_(0) . A constant retarding torque is applied on it to stop the disc. The angular velocity becomes (omega_(0))/(2) after n rotations. How many more rotations will it make before coming to rest ?

A quarter disc of radius R and mass m is rotating about the axis OO' (perpendicular to the plane of the disc) as shown. Rotational kinetic energy of the quarter disc is

A circular disc rolls down an inclined plane . The ratio of rotational kinetic energy to total kinetic energy is

A disc of mass 4.8 kg and radius 1 m is rolling on a horizontal surface without sliding with angular velocity of 600 rotations/min. What is the total kinetic energy of the disc ?

A disc of mass m has a charge Q distributed on its surface. It is rotating about an XX' with a angular velocity omega . The force acting on the disc is

RESONANCE ENGLISH-TEST PAPERS-PART - II PHYSICS
  1. The system is released from rest with both the springs in unstretched ...

    Text Solution

    |

  2. On a disc of radius R a concentric circle of radius R//2 is drawn. The...

    Text Solution

    |

  3. A ball of mass 1 kg is thrown up with an initial speed of 4 m//s. A se...

    Text Solution

    |

  4. A particle is acted upon by a force whose component's variations with ...

    Text Solution

    |

  5. A particle is released from height H. At certain height from the groun...

    Text Solution

    |

  6. A set of a identical cubical blocks lies at rest parallel to each othe...

    Text Solution

    |

  7. Choose the correct option(s) for the given sitution.

    Text Solution

    |

  8. A thin uniform rigid rod of mass m and length l is in mechanical equil...

    Text Solution

    |

  9. Two identical discs are positioned on a vertical axis as shown in the ...

    Text Solution

    |

  10. A simple pendulum A and a homogeneous rod B hinged at its enda are rel...

    Text Solution

    |

  11. A ball is thrown onto a smooth floor with speed u at angle theta = 45^...

    Text Solution

    |

  12. A small ball of mass m is released from rest at a height h(1) above gr...

    Text Solution

    |

  13. A uniform disc of mass m & radius R is pivoted at its centre O with it...

    Text Solution

    |

  14. A uniform rod of length l and mass m is hung from, strings of equal le...

    Text Solution

    |

  15. Three bodies each of mass 2kg are arranged as shown in figure. The coe...

    Text Solution

    |

  16. A spherical steel ball released at the top of a long column of gylycer...

    Text Solution

    |

  17. A metal wire of length L, area of cross-section A and young's modulus ...

    Text Solution

    |

  18. When a drop of water splits up is to number of drops

    Text Solution

    |

  19. The displacement of a particle in a medium due to a wave travelling in...

    Text Solution

    |

  20. y-x curve at an instant for a wave travelling along x-axis on a string...

    Text Solution

    |