Home
Class 12
PHYSICS
If a particle moves in a circle of radiu...

If a particle moves in a circle of radius r with constant speed under centripetal force F, then the work done in completing full circle will be ,

A

`2pirF`

B

`4pi rf`

C

`pir^(2)F`

D

zero

Text Solution

Verified by Experts

The correct Answer is:
D
`vecF.vecS=FS cos 90=0`
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

If a particle covers half the circle of radius R with constant speed then

A particle is moving in a circle with a constant speed. Its moving is

A particle moves in a circle of radius 5 cm with constant speed and time period 0.2pis . The acceleration of the particle is

A particle moves in a circle of radius 5 cm with constant speed and time period 0.2pi . The acceleration of the particle is:

A particle moves in a circle of radius 5 cm with constant speed and time period 0.2pis . The acceleration of the particle is

A particle is moving in a circle of radius R with constant speed v, if radius is double then its centripetal force to keep the same speed should be

A particle moves along a circle of radius R with a constant angular speed omega . Its displacement (only magnitude) in time t will be

A particle moves along a circle of radius R with a constant angular speed omega . Its displacement (only magnitude) in time t will be

If a particle is moving along a circle of radius 3 m with a constant speed 9 m//s , then it covers a quarter of the circle in time of

A body of mass m is movinng in a circlee off radius r with a constant speed v. the work done by the centripetal force in moving the body over half the circumference of the circle is

NIKITA PUBLICATION-CIRCULAR MOTION-Multiple Choice Question
  1. The angular frecuancy needed for a centrifugal to produce an accelerat...

    Text Solution

    |

  2. A body of mass 1 kg is rotating in a verticle circle of radius 1 m .Wh...

    Text Solution

    |

  3. If a particle moves in a circle of radius r with constant speed under ...

    Text Solution

    |

  4. The centripetal force required to hold 1 kg object in circular path by...

    Text Solution

    |

  5. An object of mass 50 kg is moving in a horizontal circle of radius 8 m...

    Text Solution

    |

  6. A body of mass 2 kg is tied to the end od a string 2 m long and revolv...

    Text Solution

    |

  7. A particle of mass 20 kg executing uniform circular motion on a path o...

    Text Solution

    |

  8. A body is tied at the end of a string and whirled round in a horizonta...

    Text Solution

    |

  9. Two particles of equal masses are revolving in circular paths of radii...

    Text Solution

    |

  10. If the kinetic energy of a particle moving with a constant speed on a ...

    Text Solution

    |

  11. A coin placed on a rotating table just slip when it is placed at a dis...

    Text Solution

    |

  12. A body of mass 5 kg is moving in a circle of radius 1m with an angula...

    Text Solution

    |

  13. A stone is tied to one end of a steing and rotated in horizontal circl...

    Text Solution

    |

  14. A string can withstand a tention of 25 N. What is the greatest speed a...

    Text Solution

    |

  15. A coin is place at a distance 9 cm from centre on a rotating turn tabl...

    Text Solution

    |

  16. A car of mass 1000 kg moves on a circular path with constant speed of ...

    Text Solution

    |

  17. A toy car weighing 1 kg tied at the end of a tring 1 m long moves in a...

    Text Solution

    |

  18. A body of mass 1 kg is suspended by a string 1 m long .The body is ro...

    Text Solution

    |

  19. A particle of mass m is moving in a horizontal circle of radius r, und...

    Text Solution

    |

  20. Two particles of equal masses are revolving in circular paths of radii...

    Text Solution

    |