Home
Class 11
PHYSICS
A long horizontal rod has a bead, which ...

A long horizontal rod has a bead, which can slide along its length and initially placed at a disatnce L from on end A of the rod. The rod is set in angular motion about A with constant angular acceleration `alpha`. If the coefficientt of friction between the rod and the bead is `mu` and gravity is neglected, then the time after which the bead starts slipping is

A

`sqrt(mu/alpha)`

B

`mu/(sqrt(alpha))`

C

`1/(sqrt(mu alpha))`

D

infinitesimal

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • Centre of mass

    MODERN PUBLICATION|Exercise Exercise|30 Videos

  • Dynamics of Circular Motion

    MODERN PUBLICATION|Exercise Exercise|81 Videos

Similar Questions

Explore conceptually related problems

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.

Point masses m_1 and m_2 are placed at the opposite ends of a rigid rod of length L, and nelgligible mass. The rod is to be set rotating about an axis perpendicular to it. Find the position on this rod through which the axis should pass in order that the work required to set the rod rotating with angular velocity omega_0 should be minimum.

A pair of parallel horizontal conducting rails of negligible resistance shorted at one end is fixed on a table. The distance between the rails is L. A conducting massless rod of resistance R can slide on the rails frictionlessly. The rod is tied to a massless string which passes over a pulley fixed to the edge of the table, A mass m, tied to the other end of the string hanges vertically. A constant magnetic field B exists perpendicular to the table. If the system is released from rest, calculate. the terminal velocity achieved by the rod.

A pair of parallel horizontal conducting rails of negligible resistance shorted at one end is fixed on a table. The distance between the rails is L. A conducting massless rod of resistance R can slide on the rails frictionlessly. The rod is tied to a massless string which passes over a pulley fixed to the edge of the table, A mass m, tied to the other end of the string hanges vertically. A constant magnetic field B exists perpendicular to the table. If the system is released from rest, calculate. the acceleration of the mass at the instant when the velocity of the rod is half the terminal velocity.

A copper rod of length 2 m fixed at one end is rotating with an angular speed 300 rad s^-1 about an axis normal to the rod and passing thorugh its fixed end. The other end of the end. The other end of the rod is in contact with a circulr metallic ring. A constant magnetic field of 0.4 T parallel to the axis exists everywhere. calculate the e.m.f. developed between the centre and the ring.

MODERN PUBLICATION-Competitive Exam Question-Exercise
  1. A weight W rests on a rough horizontal plane. If the angle of friction...

    Text Solution

    |

  2. What is the maximum value of the foce F, such that the block shown in ...

    Text Solution

    |

  3. A long horizontal rod has a bead, which can slide along its length and...

    Text Solution

    |

  4. A particle revolves round a circular path with auniform speed. The cen...

    Text Solution

    |

  5. A car is moving along a circular horizontal track of radius 10 m with ...

    Text Solution

    |

  6. The kinetic energy K of the particle moving in a circle of radius R de...

    Text Solution

    |

  7. A stone tied to string of length l is whirled in a vertical circle wit...

    Text Solution

    |

  8. A small block is shot into each of the four tracks as shown below. Eac...

    Text Solution

    |

  9. The driver of a car suddenly sees a broad wall in front of him. He sho...

    Text Solution

    |

  10. A piece of paper and an iron piece are dropped simultaneously from the...

    Text Solution

    |

  11. If a particle is moving with a constant speed along a straight line, w...

    Text Solution

    |

  12. Inertia is the property by virtue of which the body is unable to chang...

    Text Solution

    |

  13. An athlete runs some distance before taking a long jump. This is becau...

    Text Solution

    |

  14. Why does the horse rider fall forward when a running horse suddenly st...

    Text Solution

    |

  15. A body moving with a constant speed on a horizontal surface does not h...

    Text Solution

    |

  16. Two bodies of masses m1 and m2(m1>m2) and having momentum p1 and p2 mo...

    Text Solution

    |

  17. A force of 5 N acts on a body of weight 9.8 N. What is the acceleratio...

    Text Solution

    |

  18. A force of 5 N acts on a body of weight 9.8 N. What is the acceleratio...

    Text Solution

    |

  19. A force of 1 kg wt produces an acceleration in mass of 9.8 kg of

    Text Solution

    |

  20. A body is moving with a velocity 1 m s^(-1) and a force F is needed to...

    Text Solution

    |