Home
Class 12
PHYSICS
A grindstone, initially at rest, is give...

A grindstone, initially at rest, is given a constant angular acceleration so that it makes 20.0 rev in the first 8.00 s. What is its angular acceleration?

A

`0.313rad//s^(2)`

B

`2.50rad//s^(2)`

C

`3.93rad//s^(2)`

D

`1.97rad//s^(2)`

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • RIGID BODY DYNAMICS - I

    RESNICK AND HALLIDAY|Exercise PRACTICE QUESTIONS (MORE THAN ONE CORRECT CHOICE TYPE)|7 Videos
  • RIGID BODY DYNAMICS - I

    RESNICK AND HALLIDAY|Exercise PRACTICE QUESTIONS (LINKED COMPREHENSION)|7 Videos
  • RIGID BODY DYNAMICS - I

    RESNICK AND HALLIDAY|Exercise PROBLEMS|100 Videos
  • RELATIVITY

    RESNICK AND HALLIDAY|Exercise PRACTICE QUESTIONS (Integer Type)|5 Videos
  • RIGID BODY DYNAMICS-II

    RESNICK AND HALLIDAY|Exercise PRACTICE QUESTIONS (Integer Type)|2 Videos

Similar Questions

Explore conceptually related problems

A flywheel turns through 40 rev as it slows from an angular speed of 1.5 rad/s to a stop. (a) Assuming a constant angular acceleration, find the time for it to come to rest. (b) What is its angular acceleration? ( c) How much time is required for it to complete the first 20 of the 40 revolutions?

A wheel starting from rest ia rotating with a constant angular velocity of 3 rad s^-1 . What is its angular acceleration after 4 s?

An electron, starting from rest and moving with a constant acceleration, travels 2.00 cm in 5.00 ms. What is the magnitude of this acceleration ?

Two wheels, each marked with a dot on its rim, are mounted side by side. Initially the dots are alinged and wheels are at rest. One of the wheels is given a constant angular acceleration of (pi//2) rad//sec^(2) and the other wheel is given a constant angular acceleration (pi//4)rad//sec^(2) . Both acceleration are in the same direction. Find the time (in s) after which the two dots will becomes alingned again for the first time.

A body starts ratating from rest and completes 100 revolutions in 20 s. Find its angular acceleration

A circular disc is rotating about its own axis at constant angular acceleration. If its angular velocity increases from 210 rpm to 420 rpm during 21 rotations then the angular acceleration of disc is

A wheel is making revolutions about its ais with unifrom angular acceleration. Starting from rest, ilt reaches 100 rev/sec in 4 seconds. Find the angular acceleration. Find the angle rotated during these four seconds.

A wheel initially has an angular velocity of 18 rad/s. It has a costant angular acceleration of 2 rad/ s^2 and is slowing at first. What time elapses before its angular velocity is 22 rad/s in the direction opposite to its initial angular velocity?

A disc, initially at rest, starts rotating about its own axis/ with a constant angular acceleration of 0*2 rad/s2. The time taken by the disc to rotate by 10 rad (in seconds) is

RESNICK AND HALLIDAY-RIGID BODY DYNAMICS - I-PRACTICE QUESTIONS (SINGLE CORRECT CHOICE TYPE)
  1. During the time a CD accelerates from rest to a constant rotational sp...

    Text Solution

    |

  2. A person is riding a bicycle, and its wheels have an angular velocity ...

    Text Solution

    |

  3. A grindstone, initially at rest, is given a constant angular accelerat...

    Text Solution

    |

  4. A thin circular ring of mass M and radius R is rotating about its axis...

    Text Solution

    |

  5. A wheel turns through an angle of 188 rad in 8.0 s, and its angular sp...

    Text Solution

    |

  6. A uniform disc of mass M and radius R is initially at rest. Its axis i...

    Text Solution

    |

  7. A 1.0 m roulette wheel reaches a maximum angular speed of 18 rad/s bef...

    Text Solution

    |

  8. A ody is in pure rotation. The linear speed v of a particle, the dista...

    Text Solution

    |

  9. A circular disk of radius 0.010 m rotates with a constant angular spee...

    Text Solution

    |

  10. After 10.0 s, a spinning roulette wheel at a casino has slowed down to...

    Text Solution

    |

  11. A circular disk of radius 2.0 m rotates, starting from rest, with a co...

    Text Solution

    |

  12. At the local swimming hole, a favorite trick is to run horizontally of...

    Text Solution

    |

  13. The original Ferris wheel has a radius of 38 m and completed a full re...

    Text Solution

    |

  14. The figure shows a graph of the angular velocity of a rotating wheel a...

    Text Solution

    |

  15. The figure shows the top view of a door that is 2 m wide. Two forces a...

    Text Solution

    |

  16. Three objects are attached to a massless rigid rod that has an axis of...

    Text Solution

    |

  17. A solid circular disk has a mass of 1.2 kg and a radius of 0.16 m. Eac...

    Text Solution

    |

  18. A 50 kg rider on a moped of mass 75 kg is traveling with a speed of 20...

    Text Solution

    |

  19. A long thin rod is cut into two pieces, one being twice as long as the...

    Text Solution

    |

  20. A 50 N m torque acts on a wheel with a moment of inertia 150kg*m^(2). ...

    Text Solution

    |