Home
Class 12
PHYSICS
A wheel has moment of inertia 5 xx 10^(-...

A wheel has moment of inertia `5 xx 10^(-3) kg m^(2)` and is making `20 "rev" s^(-1)`. The torque needed to stop it in `10 s` is….. `xx 10^(-2) N-m`

A

`2pi xx 10^(-2)N m`

B

`pi xx 10^(-2) Nm`

C

`2pi xx 10^(2) Nm`

D

`4pi xx 10^(-2) Nm`

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • QUESTION PAPER 2019

    TARGET PUBLICATION|Exercise MCQ|45 Videos

  • SEMICONDUCTORS

    TARGET PUBLICATION|Exercise Evaluation Test|17 Videos

Similar Questions

Explore conceptually related problems

A wheel has a moment of inertia of 5xx10^(-3) kg m"^(2) and is making "20 rev/s". What is the magnitude of the torque required to stop it in 10 s?

A wheel of moment of inertia 5xx10^(-3) kg m^(2) is making 20 revolutions per second. If it is stopped in 20 s, then its angular retardation would be

A flywheel of moment of inertia 3 xx 10^(2) kg m^(2) is rotating with uniform angular speed of 4.6 rad s^(-1) . If a torque of 6.9 xx 10^(2)Nm retards the wheel, then the time in which the wheel comes to rest is

A wheel of moment of inertia 2.0 xx 10^3 kgm^2 is rotating at uniform angular speed of 4 rads^-1 . What is the torque required to stop it in one second.

A balance-wheel of a watch has a moment of inertia equal to 2 xx 10^(-8) kg m^(2) . When it is rotated by 30^(@) , a restoring torque of 5.13 xx 10^(-6) Nm is generated, calculate its frequency of oscillations.

A sphere of moment of inertia 10kgm^(2) is rotating at a speed of 100 rad/s. Calculate the torque required to stop it in 10 minutes. Also calculate the angular momentum of the wheel two minutes before it stops rotating.

A fly wheel of M.I. 6xx10^(-2) kgm^(2) is rotating with an angular velocity of 20 rad s^(-1) . The torque required to bring it to rest in 4s is

The torque required to stop a wheel having moment of inertia 5xx10^(-3)kgm^(2) from a speed of 10 radian s^(-1) in 20s is

A wheel with moment of inertia 10 kg m^(2) is rotating at (2//pi) rps on its axis. The frictional torque acting on it, if it makes 20 rotations befor stopping is

TARGET PUBLICATION-ROTATIONAL MOTION -MCQ
  1. A solid sphere of mass 2 kg and radius 5 cm is rotating at the rate of...

    Text Solution

    |

  2. Due to a certain redistribution of masses, the totment of inertia of a...

    Text Solution

    |

  3. A wheel has moment of inertia 5 xx 10^(-3) kg m^(2) and is making 20 "...

    Text Solution

    |

  4. A wheel having a rotational inertia of 0.16"kg-m"^(2) rotates at 240 r...

    Text Solution

    |

  5. An automobile engine develops 100 kilo-watt, when rotating at a speed ...

    Text Solution

    |

  6. The radius of gyration of flywheel is (3//pi)m and its mass is 1 kg. I...

    Text Solution

    |

  7. A loop and a disc have same mass and roll without slipping with the sa...

    Text Solution

    |

  8. A body of radius R and mass m is rolling smoothly with speed v on a ho...

    Text Solution

    |

  9. A ring of mass 0.3 kg and radius 0.1 m and a solid cylinder of mass 0....

    Text Solution

    |

  10. If a spherical ball rolls on a table without slipping, the fraction of...

    Text Solution

    |

  11. Total kinetic energy of a rolling solid spher of mass m with velocity ...

    Text Solution

    |

  12. A hollow cylinder open at both ends slides without rotating, and then ...

    Text Solution

    |

  13. A sphere is rolling down an inclined plane without slipping. The ratio...

    Text Solution

    |

  14. A solid sphere is moving on a horizontal plane. Ratio of its translati...

    Text Solution

    |

  15. Two identical cylinders 'run a race' starting from rest at the top of ...

    Text Solution

    |

  16. An inclined plane makes an angle 30° with the horizontal. A solid sphe...

    Text Solution

    |

  17. Two uniform thin rods each of mass M and length I are placed along X a...

    Text Solution

    |

  18. Four particles, each of mass m, are lying symmetrically on the rim of ...

    Text Solution

    |

  19. Radius of gyration of a body about an axis at a distance 6 cm from its...

    Text Solution

    |

  20. The moment of inertia of a thin uniform rod of mass M and length L abo...

    Text Solution

    |