Home
Class 12
PHYSICS
What torque will increase angular veloci...

What torque will increase angular velocity of a solid disc of mass 16kg and diameter 1 m from zero to 2 rpm in 8 s ?

A

`(pi)/(4) N-m`

B

`(pi)/(2)N-m`

C

`(pi)/(3)N-m`

D

`(pi) N-m`

Text Solution

Verified by Experts

The correct Answer is:
d
Promotional Banner

Topper's Solved these Questions

  • PRACTICE SET 23

    MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS|Exercise Paper-1(PHYSICS & CHEMISTRY)|50 Videos
  • RAY OPTICS

    MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS|Exercise EXERCISE 2 (MISCELLANEOUS PROBLEMS)|19 Videos

Similar Questions

Explore conceptually related problems

The work done in increasing the angular frequency of a circular ring of mass 2kg and radius 25cm from 10rpm to 20rpm about is axis

What is the work done in increasing the angular frequency of a circular ring of mass 2kg and radius 25cm from 10rpm to 20rpm about its axis?

A disc of mass 2 kg and radius 0.2 m is rotating about an axis passing through its centre and perpendicular to its plane with an angular velocity 50 rad/s . Another disc of mass 4 kg and radius 0.1m rotates about an axis passing through its centre and perpendicular to its plane with angular velocity 100 rad/s. If the two disc are coaxially coupled, then the angular velocity of coupled system would be

The diameter of a solid disc is 0.5 m and its mass is 16 kg. What torque will increase its angular velocity from zero to 120 ratations/minute in 8 seconds.

What constant torque should be appiled to a disc of mass 10 kg and diameter 50 cm so that it acquires an angular velocity of 2pi rad/s in 4 s ? The disc is initially at rest and rotates about an axis through the centre of the disc and in a plane perpendicular to the disc.

A rough disc of mass m rotates freely with an angular velocity omega . If another rough disc of mass m/2 and same radius but spinning in opposite sense with angular speed omega is kept on the first disc. Then:

A grind-stone is in the form of a solid cylinder has a radius of 0.5 m and a mass 50 kg. What torque will bring it from rest to an angular velocity of 300 rev/min in 10 s ? What is the kinetic energy when it is rotating at 300 rev/min ?

A disc of mass 16 kg and radius 25 cm is rotated about its axis. What torque will increase its angular velocity from 0 to 8 pi rad/s in 8 s ?

A grindstone in the form of a solid cylinder has a radius of 0.2m and a mass of 30 kg. (a)What constant torque will bring it from rest to an angular velocity of 250 rev // min in 10 s ? (b) Through what angle has it turned during that time ? (c) Calculate the work done by the torque.

A large disc has mass 2kg and radius 0.2 m and initial angular velocity 50 rad/s and small disc has mass 4kg and radius 0.1 m and initial angular velocity 200 rad/s both rotating about their common axis. Then the common final angular velocity after discs are in contact is,

MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-PRACTICE SET 24-Paper 1 (Physics and Chemistry)
  1. Two discs of the same material and thickness have radii 0.2 m and 0.6 ...

    Text Solution

    |

  2. The diameter of a flywheel is increased by 1% . Increase in its moment...

    Text Solution

    |

  3. What torque will increase angular velocity of a solid disc of mass 16k...

    Text Solution

    |

  4. A ray of light is incident on a plane mirror along the direction given...

    Text Solution

    |

  5. The weight of a person on earth is 600 N. His weight on moon will appe...

    Text Solution

    |

  6. A satellite of the earth is revolving in a circular orbit with a unifo...

    Text Solution

    |

  7. A lifts is tied with thick iron wires and its mass is 1000 kg. The min...

    Text Solution

    |

  8. The image of a small electric bulb fixed on the wall of a room is to b...

    Text Solution

    |

  9. A soap bubble in vacuum has a radius of 3 cm and another soap bubble i...

    Text Solution

    |

  10. A number of small drops of mercury adiabatically coalesce to form a si...

    Text Solution

    |

  11. A gas is found to obey the law p^(2)V = constant. The initial temperat...

    Text Solution

    |

  12. In order to double the separation between the molecules (keeping tempe...

    Text Solution

    |

  13. The best laboratory approximation to an ideal black body is .

    Text Solution

    |

  14. IN a new system of units called star units, 1 kg* = 10 kg , 1m* = 1km ...

    Text Solution

    |

  15. A horizontal platform with an object palced on it executes simple horm...

    Text Solution

    |

  16. The currect voltage relation of diode is given by 1=(e^(1000 V//T)-1) ...

    Text Solution

    |

  17. The periodic time T of a simple pendulum are observed , for different ...

    Text Solution

    |

  18. If wavelength of a sound wave in a medium is reduced by 50% , then the...

    Text Solution

    |

  19. A string is producing transverse vibration whose equation is y = 0.021...

    Text Solution

    |

  20. An open U-tube contains mercury. When 11.2 cm of water is poured into ...

    Text Solution

    |