Home
Class 12
PHYSICS
A stone of mass 1//2 kg is whriled round...

A stone of mass `1//2` kg is whriled round the end of a piece of string in a horizontal circle of radius half a meter with a uniform speed of `1 m//s`. The tension in the string is

A

`25xx10^(3)` dynes

B

`10^(5)` dynes

C

`5xx10^(4)` dynes

D

`4xx10^(5)` dynes

Text Solution

Verified by Experts

The correct Answer is:
B
`T=(mv^(2))/(r0=(1)/(2)xx(1)/(0.5)=1N`
`=10^(5)` dyne.
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

A stone of mass 50 g is tied to the end of a string 2 m long and is set into rotation in a horizontal circle with a uniforn speed of 2m//s .Then tension in the string is

A stone of mass 0.3 kg tied to the end of a string in a horizontal plane whirled in a circle of radius 1 m with a speed of 40 "rev min"^(-1) . (i) What is the tension in thr string ? (ii) What is the maximum speed with which the stone can be whirled around if the string can withstand the maximum tension of 200 N ?

A stone of of mass 0 .25 kg tied to the end of a string is whirled round in a circle of radius 1.5 m with a speed of 40 rev//min in a horizontal plane What is the tension in the string ? What is the maximum speed with which the stone can be whirled around If the string can withstand a maximum tension of 200 N ?

Stone of mass 1 kg tied to the end of a string of length 1m , is whirled in horizontal circle with a uniform angular velocity 2 rad s^(-1) . The tension of the string is (in newton)

A stone of mass 1 kg tied at the end of a string of length 1 m and is whirled in a verticle circle at a constant speed of 3 ms^(-1) . The tension in the string will be 19 N when the stone is (g=10 ms^(-1))

A stone of mass 0.4 kg is tied to a string and rotated in a vertical circle of radius 1.2 m . Calculate the speed of the stone for which the tension in the string is zero at the highest point of the circle . What is the tension at the lowest point in this case ?

An object of mass 2 kg is whirled rround in a verticle circle of radius 1m with a constant speed of 4 m//s .Then the maximum tension in the string is (g=10 m//s^(2))

A stone of mass 0.3 kg attched to a 1.5 m long stirng is whirled around in a horizontal cirlcle at a speed of 6 m/s The tension in the string is

NIKITA PUBLICATION-CIRCULAR MOTION-Multiple Choice Question
  1. A particle describes a horizontal circle in a conical funne whoses inn...

    Text Solution

    |

  2. The string of pendulum of length l is displaced through 90^(@) from th...

    Text Solution

    |

  3. A stone of mass 1//2 kg is whriled round the end of a piece of string ...

    Text Solution

    |

  4. A stone of mass 50 g is tied to the end of a string 2 m long and is s...

    Text Solution

    |

  5. A chain of 100 links is 1 m long and has a mass of 2 kg . With the end...

    Text Solution

    |

  6. A gramophone disc rotates with a uniform angular velocity of 6 rad//s...

    Text Solution

    |

  7. A boy is sitting on a horizontal platform of joy wheel at a distance o...

    Text Solution

    |

  8. For a body travelling along a circle of radius 4 m and with a speed of...

    Text Solution

    |

  9. A body moves along a circle of radius 1 m with a constant kinetic ener...

    Text Solution

    |

  10. A vehicle is moving with uniform speed along horizontal, concave and c...

    Text Solution

    |

  11. Two particles of masses in the ratio 2:1 are moving in circular paths ...

    Text Solution

    |

  12. A car moves at a constant speed on a road as shown in figure. The norm...

    Text Solution

    |

  13. A coin placed on a gramophone record at 100//3 rpm flies off when it i...

    Text Solution

    |

  14. A ball of mass 0.6 kg attached to a light inextensible string rotates ...

    Text Solution

    |

  15. Four point size metal spheres each of mass 1 kg are placed on a turn t...

    Text Solution

    |

  16. The 'well of death' in a circus consists of a vertical hollow cylinder...

    Text Solution

    |

  17. If a car is taking turn along a circular track, then the necessary for...

    Text Solution

    |

  18. A car is moving along a horizontal curve road, the necessary centripet...

    Text Solution

    |

  19. On a horizontal curved road, the maximum safe speed of a vehicle to mo...

    Text Solution

    |

  20. On a horizontal curved road , the skidding or overturning of a vehicle...

    Text Solution

    |