Home
Class 11
PHYSICS
A cord of negligible mass is wound round...

A cord of negligible mass is wound round the rim of a flywheel of mass 20 kg and radius 20 cm. A steady pull of 25 N is applied on the cord. The flywheel is mounted on a horizontal axis with frictionless bearings
Find the kinetic energy of the wheel at this point when 2m of the cord is unwound. Assume that wheel starts from rest.

Promotional Banner

Topper's Solved these Questions

  • SIMPLE HARMONIC MOTION

    PATHFINDER|Exercise QUESTION BANK |114 Videos

  • THERMODYNAMICS,BEHAVIOUR OF PERFECT GAS AND KINETIC THEORY OF GASES AND HEAT TRANSFER

    PATHFINDER|Exercise QUESTION BANK|163 Videos

Similar Questions

Explore conceptually related problems

A cord of negligible mass is wound round the rim of a flywheel of mass 20 kg and radius 20 cm. A steady pull of 25 N is applied on the cord. The flywheel is mounted on a horizontal axis with frictionless bearings Compute the angular acceleration of the wheel.

A force of 30 N acts on a body of mass 2.0 kg starting from rest upto a distance of 3.0 m . Then the force reduces to 15N and acts in the same direction upto 2.0 m . Calculate the final kinetic energy of the body.

PATHFINDER-SYSTEM OF PARTICLES AND ROTATIONAL MOTION-QUESTION BANK
  1. Is moment of inertia a scalar or vector quantity?

    Text Solution

    |

  2. Energy of 484 J is spent in increasing the speed of flywheel from 60 r...

    Text Solution

    |

  3. A fly wheel is revolving with constant angular velocity. A chip of its...

    Text Solution

    |

  4. A 10 kg boy standing on a 40 kg boat floating on water is 20 m from th...

    Text Solution

    |

  5. A particle performing uniform circular motion has angular momentum L. ...

    Text Solution

    |

  6. What will be the duration of the day if the earth suddenly shrinks to ...

    Text Solution

    |

  7. If an automobile engine develops a power of 7.5xx10^4 W when rotating ...

    Text Solution

    |

  8. If the earth were to suddenly contract to 1/n th of its present radius...

    Text Solution

    |

  9. Distinguish between centre of mass and centre of gravity.

    Text Solution

    |

  10. The angular speed of a motor wheel is increased from 1200 rpm to 3120 ...

    Text Solution

    |

  11. The angular speed of a motor wheel is increased from 1200 rpm to 3120 ...

    Text Solution

    |

  12. A hoop of radius 2 m weighs 100 kg. It rolls along a horizontal floor ...

    Text Solution

    |

  13. A cord of negligible mass is wound round the rim of a flywheel of mass...

    Text Solution

    |

  14. A cord of negligible mass is wound round the rim of a flywheel of mass...

    Text Solution

    |

  15. A cord of negligible mass is wound round the rim of a flywheel of mass...

    Text Solution

    |

  16. Define angular momentum Derive the relation between angular momentum...

    Text Solution

    |

  17. State and prove theorem of parallel axis on moment of inertia.

    Text Solution

    |

  18. Derive an expression for kinetic energy of Rolling Motion.

    Text Solution

    |

  19. There bodies, a ring, a solid cylinder and a solid sphere roll down th...

    Text Solution

    |

  20. In a system comprising of two particles of mass 2 kg and 5 kg, the pos...

    Text Solution

    |