Home
Class 12
PHYSICS
A fan is rotating with a speed of 450 re...

A fan is rotating with a speed of 450 rec/minute. Afer being switched off it comes to rest in 10s. Assuming constant angular deceleration, calculate the number of recvolutions made by it before coming to rest.

A

37.5

B

37

C

38.5

D

None

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • RACE

    ALLEN|Exercise Basic Maths (GRAVITATION)|25 Videos
  • RACE

    ALLEN|Exercise Basic Maths (Properties of Matter & Fluid Mechanics)(Elasticity)|20 Videos
  • RACE

    ALLEN|Exercise Basic Maths (COLLISION AND CENTRE OF MASS )|12 Videos
  • NEWTONS LAWS OF MOTION

    ALLEN|Exercise EXERCISE-III|28 Videos
  • SIMPLE HARMONIC MOTION

    ALLEN|Exercise Example|1 Videos

Similar Questions

Explore conceptually related problems

The motor of an engine is erotating about its axis with an angular velocity of 100 rev/minute. It comes to rest in 15 s, after being switched off. Assumgn cnstant angular decelertion, calculate the number of revolutions made by it before coming to rest.

The motor of an engine is rotating about its axis with angular velocity of 120 rpm . It comes to rest in 10s , after being switched off. Assuming constant deceleration, calculate the number of revolutions made by it before coming to rest.

The motor of an engine is rotating about its axis with an angular velcoity of 100 rev me^(-1) . It comes to rest is 15 s, after being switched off. Assuming constant angualar decelearation . What are the numbers of revolutions made by it befor coming to rest ?

The motor of an engine is rotating about its axis with an angular velocity of 100 rpm. It comes to rest in 15s , after being switched off. If angular deceleration is constant, what is the number to revolutions made by it before coming to rest ?

A wheel of a bicycle is rotating about its axis with an angular velocity of 100 rpm. When the brakes are applied, the wheel comes to rest in 10 s. Calculate the number of revolutions made by the wheel before coming to rest. Assume that the deceleration is constant.

A table fan rotating at a speed of 2400 rpm is switched off and the resulating variation of the revolution/minute time is shown in Fig. The total number of revolutions of the fan before it comes to rest is

A whel of M.I. = 1 kg-m^(2) is rotating at an angular speed of 40 rad/s. Due to friction on the axis, the wheel comes to rest in 10 minute. What is the angular momentum of the wheel in kg m^(2)//s two minutes before it comes to rest ?

ALLEN-RACE-Basic Maths (ROTATIONAL MOTION)
  1. A fan is rotating with a speed of 450 rec/minute. Afer being switched ...

    Text Solution

    |

  2. A particle is moving with constant speed v along the line y = a in pos...

    Text Solution

    |

  3. A disc rotating about its axis/s in 4 second. The angle rotated by it ...

    Text Solution

    |

  4. A body rotating with uniform angular acceleration covers 100 pi (radia...

    Text Solution

    |

  5. A wheel starting from rest is uniformly accelerated at 2 red/s^(2) for...

    Text Solution

    |

  6. A body rotates about a fixed axis with an angular acceleration of 3 ra...

    Text Solution

    |

  7. Two particles of masses m and 2m are placed at separation L. Find the ...

    Text Solution

    |

  8. For a disc of given density and thickness, its moment of inertia varie...

    Text Solution

    |

  9. If a disc of moment of inertia 1 and radius r is reshaped into a ring ...

    Text Solution

    |

  10. Two circular loops A and B of radii R and 2R respectively are made of ...

    Text Solution

    |

  11. A thin uniform metallic triangular sheet of mass M has sides AB=BC=L. ...

    Text Solution

    |

  12. Four solid rigid balls reach of mass m and radius r are fixed on a rig...

    Text Solution

    |

  13. The radius of gyration (K) of a rigid body changes with change of :-

    Text Solution

    |

  14. Four spheres of diameter 2a and mass M are placed with their centres o...

    Text Solution

    |

  15. Three rods each of mass m and length l are joined together to form an ...

    Text Solution

    |

  16. A thin wire of length l and mass m is bent in the form of a semicircle...

    Text Solution

    |

  17. A disc of mass m and radius r is free to rotate about its centre as sh...

    Text Solution

    |

  18. A particle of mass m is projected with speed u at an angle theta with ...

    Text Solution

    |

  19. A cubical block of mass m and edge a slides down a rough inclned plane...

    Text Solution

    |

  20. The torpue of force vecF=-2hati+2hatj+3hatk acting on a point vecr=hat...

    Text Solution

    |