Home
Class 12
PHYSICS
A wheel increases its speed from 60 rpm ...

A wheel increases its speed from 60 rpm to 120 rpm in 10 s. Number of rotation made by it in 10 s is

A

10

B

15

C

25

D

20

Text Solution

Verified by Experts

The correct Answer is:
B
`N=((n_(1)+n_(2))/(2))t`
`=((60+120)xx10)/(2xx60)=(180)/(60xx2)xx10=15`.
Promotional Banner

Topper's Solved these Questions

  • ATOMS, MOLECULES AND NUCLEI

    NIKITA PUBLICATION|Exercise MCQs|443 Videos

  • COMMUNICATION SYSTEMS

    NIKITA PUBLICATION|Exercise Multiple Choice Questions (Examples for Practice)|8 Videos

Similar Questions

Explore conceptually related problems

The angular velocity of a wheel increases from 120 to 480 rpm in 10 s .The number of revolutions made during this time is

A motor increases its speed from 500 rpm to 1000 rpm in 10 s. Calculate its angular acceleration and the number of revolutions made by it in this time.

The angular velocity of a wheel increases from 100 to 300 in 10 s. The number of revolutions made during that time is

The angular speed of truck wheel is increased from 900rpm to 2460 rpm in 26 seconds.The number of revolutions by the truck engine during this time is "____________" . ( Assuming the acceleration to be uniform )

The speed of a motor increases uniformly from 600 rpm to 1200 rpm in 10 second. How many revolutions does it make in this period

A body rotating with an angular speed of 600 rpm is uniformly accelerated to 1800 rpm in 10 sec. The number of rotations made in the process is

The speed of a wheel increases from 600 rpm to 1200 rpm in 20 s . What is its angular acceleration ? How many revolutions will it make during this time ?

The angular speed of the wheel of a vehicle is increased from 360 rpm to 1200 rpm in 14 second Its angular acceleration is

NIKITA PUBLICATION-CIRCULAR MOTION-Multiple Choice Question
  1. The acceleration of a body moving round a curve of radius 160 m at 20 ...

    Text Solution

    |

  2. The ratio of angular speeds of minutes hand and seconds hand in a watc...

    Text Solution

    |

  3. A wheel increases its speed from 60 rpm to 120 rpm in 10 s. Number of ...

    Text Solution

    |

  4. A particle is moving along a circle of radius 3 m .If its centripetal ...

    Text Solution

    |

  5. A particle tied to a string of negligible weight and length l is swung...

    Text Solution

    |

  6. Two racing cars of masses m(1) and m(2) are moving in circles of radii...

    Text Solution

    |

  7. A body is revoving with a constant speed along a circle. If its direct...

    Text Solution

    |

  8. The force acts ona particle perfoming uniform circular motion and whic...

    Text Solution

    |

  9. The centripetal force in magnitude and direction is given by

    Text Solution

    |

  10. The direction of centripetal acceleration or radian acceleration

    Text Solution

    |

  11. A stone tied at the end of sring is whirled in a circle. If the string...

    Text Solution

    |

  12. If the earth revolves round the sun in a circular orbit, then the nece...

    Text Solution

    |

  13. Centripetal force is a real force because its origing can

    Text Solution

    |

  14. A force which is equal and opposite to centripetal force in uniform ci...

    Text Solution

    |

  15. Centrifugal force is pseudo force because

    Text Solution

    |

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

    Text Solution

    |

  17. Centrifuges are speed to separate the particles of

    Text Solution

    |

  18. Select the wrong statement

    Text Solution

    |

  19. The driver of a car travelling at velocity v suddenly see a broad wall...

    Text Solution

    |

  20. A person on a rotating table, if remains at rest, then he will assume...

    Text Solution

    |