Home
Class 11
PHYSICS
A homogeneous disc of weight W and radiu...

A homogeneous disc of weight W and radius R rotates about the vertical axis OZ, the initial angular velocity being `omega_(0)`. During the motion, the brake block A is pressed to the disc,with a radial force N for `t_(0)` seconds and the disc comes to rest because of friction. Find the coefficient of friction.

Text Solution

Verified by Experts

The correct Answer is:
`[(WRomega_(0))/(2gNt_(0))]`
Promotional Banner

Topper's Solved these Questions

  • RIGID BODIES AND ROTATIONAL MOTION

    PHYSICS GALAXY - ASHISH ARORA|Exercise MCQ|16 Videos

  • NEWTONS LAWS OF MOTION

    PHYSICS GALAXY - ASHISH ARORA|Exercise Unsolved Numerical Problem|81 Videos

  • WORK, ENERGY AND POWER

    PHYSICS GALAXY - ASHISH ARORA|Exercise unsolved|1 Videos

Similar Questions

Explore conceptually related problems

A smooth horizontal disc rotates about the vertical axis O (figure) with a constant angular velocity omega . A thin uniform rod AB of length l performs small oscillation about the vertical axis A fixed to the disc at a distance a from the axis of the disc. Find the frequency omega_(0) of these oscillations.

A uniform disc of mass m and radius R rotates about a fixed vertical axis passing through its centre with angular velocity omega . A particle of same angular velocity mass m and moving horizontally with velocity 2omegaR towards centre of the disc collides and sticks to its rim. The impulse on the particle due to the disc is

A uniform disc of mass M and radius R is rotating about a horizontal axis passing through its centre with angular velocity omega . A piece of mass m breaks from the disc and flies off vertically upwards. The angular speed of the disc will be

A uniform disc of mass m and radius R rotates about a fixed vertical axis passing through its centre with angular velocity omega . A particle of same mass m and having velocity of 2omegaR towards centre of the disc collides with the disc moving horizontally and sticks to its rim. Then

A uniform circular disc of radius R is rotating about its own axis with moment of inertia I at an angular velocity omega if a denser particle of mass m is gently attached to the rim of disc than its angular velocity is

A circular disc of radius R is rotating about its axis O with a uniform angular velocity omega"rad s"^(-1) as shown in the figure. The magnitude of the relative velocity of point A relative to point B on the disc is

A disc of radius 4m is rotating about its fixed centre with a constant angular velocity 2(rad)/(s) (in the horizontal plane).A block is also rotating with the disc without slipping. If co-efficient of friction between the block and the disc is 0.4 ,then the maximum distance at which the block can rotate without

A non-conducting thin disc of radius R charged uniformly over one side with surface density s rotates about its axis with an angular velocity omega . Find (a) the magnetic induction at the centre of the disc, (b) the magnetic moment of the disc.

PHYSICS GALAXY - ASHISH ARORA-RIGID BODIES AND ROTATIONAL MOTION-Unsolved Numerical
  1. A ball ofmass m moving with velocity experiences a head on elastic col...

    Text Solution

    |

  2. A spool has a mass of 2 kg,an inner radius R(1) =3cm,and an outer radi...

    Text Solution

    |

  3. A homogeneous disc of weight W and radius R rotates about the vertical...

    Text Solution

    |

  4. A uniform disc of mass m and radius R is projected horizontally with v...

    Text Solution

    |

  5. A uniform rod AB of mass m = 2 kg and length l = 1.0 m is placed on a ...

    Text Solution

    |

  6. A small ball is suspended from a point O by a light thread of length l...

    Text Solution

    |

  7. An object rotates about a fixed axis, such that a reference line on th...

    Text Solution

    |

  8. A rectangular rigid fixed block has a long horizontal edge. A solid ho...

    Text Solution

    |

  9. A 392 N wheel comes off a moving truck and rolls without slipping alon...

    Text Solution

    |

  10. A grindstone in the form of a solid cylinder has a radius of 0.2m and ...

    Text Solution

    |

  11. A constant net torque equal to 20 N-m is exerted on a pivoted wheel fo...

    Text Solution

    |

  12. In the arrangement shown in figure a weight A possesses mass m, a pull...

    Text Solution

    |

  13. A solid spherical ball of radius 30 cm and mass M is connected to a po...

    Text Solution

    |

  14. A thin uniform rod of mass m and length l rotates with the constant an...

    Text Solution

    |

  15. A rod of mass m and length l is held vertically on a smooth horizontal...

    Text Solution

    |

  16. Consider a cylinder of mass M and radius R lying on a rough horizontal...

    Text Solution

    |

  17. A uniform rod of length 1 m and mass 2 kg is suspended. Calculate tens...

    Text Solution

    |

  18. The mechanism shown in figure-5.156 is used to raise a wooden box of m...

    Text Solution

    |

  19. A uniform spherical shell of mass M and radius R rotates, about a vert...

    Text Solution

    |

  20. Show that if a rod held at angle theta to the horizontal and released,...

    Text Solution

    |