Home
Class 12
PHYSICS
1. A stone tied to a string is rotated i...

1. A stone tied to a string is rotated in a vertical circle. The minimum speed with which the string has to be rotated.

A

Decreases with increasing mass of the ston

B

Is independent of the mass of the stone

C

Decreases with increasing in len"gt"h of the string

D

Is independent of the len"gt"h of the string.

Text Solution

Verified by Experts

Maximum speed,
`v=sqrt(murg)=sqrt(0.2xx18xx10)=6m//s`
`v=6xx18/5=(108)/5=21.6km//hr`.
Promotional Banner

Topper's Solved these Questions

  • GRAVITATION

    SIA PUBLICATION|Exercise MCQs|35 Videos

  • LAWS OF MOTION

    SIA PUBLICATION|Exercise M.C.Q|41 Videos

Similar Questions

Explore conceptually related problems

A stone tied to a string is whirled in a vertical circle with unifrom speed. If the difference between the maximum and minimum tensions is 1kgwt, the mass of stone is

A body of weight 10 N attached to one end of a string of length 1m is rotated in a vertical plane. At the instant when the string makes an angle of 60^(@) with the downward vertical the speed of the bob is sqrt(9.8) ms^(-1) . The tension in the string at that instant is equal to

A body tied at end of a string of length .l. is rotated in a vertical circle. The velocity of the body at the highest point is sqrt(2gl) . The maximum velocity of the body would be

SIA PUBLICATION-KINETIC THEORY -PROBLEM ( MCQs )
  1. A person throws a bottle into a dust-bin at the same height as he is 2...

    Text Solution

    |

  2. A car starts from rest, attains a velocity of 36 kmh^-1 with an accele...

    Text Solution

    |

  3. 1. A stone tied to a string is rotated in a vertical circle. The minim...

    Text Solution

    |

  4. The maximum speed with which a car can be driven touqd a curve of radi...

    Text Solution

    |

  5. For an electron circulating around the nucleus, the centripetal force ...

    Text Solution

    |

  6. A particle is moving east wards with a velocity of 15 ms^(-1). In a ti...

    Text Solution

    |

  7. The reaction time for a car driver is 0.9 s. If the car travetling ini...

    Text Solution

    |

  8. The angular velocity of the second's-hand ofa watch is

    Text Solution

    |

  9. The direction of velocity and acceleration of a projectile at the high...

    Text Solution

    |

  10. A bomb is dropped from an aircraft travelling horizontal at 150 ms^-1 ...

    Text Solution

    |

  11. The angle made by the vector vecA = veci + vecj with x-axis is

    Text Solution

    |

  12. A fan is making 600 rev/min. If it makes 1200 rev/min, what is the inc...

    Text Solution

    |

  13. The angular velocity of a rickshaw wheel is 70 rads^-1. If !he radius ...

    Text Solution

    |

  14. If a particle tied to the end of string is set in circular motion then...

    Text Solution

    |

  15. A motor cycle is travelling on a curved track of radius 500 m. If the ...

    Text Solution

    |

  16. A body is projected vertically up with speed u takes time T to reach m...

    Text Solution

    |

  17. The displacement of a particle moving in a straight line is given by x...

    Text Solution

    |

  18. A body falling for 2 s covers a distance a which is equal to that cove...

    Text Solution

    |

  19. A stone tied to a string rotated with uniform speed in a vertical plan...

    Text Solution

    |

  20. A 2 kg stone tied at the end of a string of l m len"gt"h, is whirled a...

    Text Solution

    |