Home
Class 12
PHYSICS
A mass is whirled in a circular path wit...

A mass is whirled in a circular path with a constant angular velocity and its angular momentum is L. If the string is now halved keeping the angular velocity same, the angular momentum is

A

L/4

B

L

C

2L

D

L/2

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • QUESTION PAPER 2019

    TARGET PUBLICATION|Exercise MCQ|45 Videos

  • SEMICONDUCTORS

    TARGET PUBLICATION|Exercise Evaluation Test|17 Videos

Similar Questions

Explore conceptually related problems

A particle attached to a string is rotating with a constant angular velocity and its angular momentum is L. If the string is halved and angular velocity is kept constant, the angular momentum will be

A mass is whirled in a circular path with an angular momentum L . If the length of string is now halved keeping the angular velocity same, the new angular momentum is

A mass is whirled in a circular path with an angular momentum L . If the length of string and angular velocity, both are doubled, the new angular momentum is

A mass is whirled in a circular path with an angular momentum L. If the length of string and angular velocity,both are doubled the new angular momentum is NL. Find the value of N

Angular momentum||Examples on angular momentum

A mass M hangs on a massless rod of length l which rotates at a constant angular frequency. The mass M moves with steady speed in a circuilar path of constant radius. Assume that the system is in steady circular motion with constant angular velocity omega . The angular momentum of M about point A is L_(A) , which lies in the positive z direction and the angular momentum of M about point B is L_(B) . The correct statement for this system is :

When a body is moving with a constant angular velocity , its angular acceleration is…………………………………. .

Angular momentum of a rigid body rotating about a fixed Axis with angular velocity vec omega

TARGET PUBLICATION-ROTATIONAL MOTION -MCQ
  1. If the angular momentum of a body increases by 50%, its kinetic energy...

    Text Solution

    |

  2. A rigid and a disc of different masses are rotating with the same kine...

    Text Solution

    |

  3. A mass is whirled in a circular path with a constant angular velocity ...

    Text Solution

    |

  4. A ball of radius 10 cm and mass 8 kg rolls down a ramp of length 3.5 m...

    Text Solution

    |

  5. A disc rotates horizontal at the rate of 100 rpm and M.I. of the disc ...

    Text Solution

    |

  6. A disc of uniform thickness and radius 50 cm is made of two zones. The...

    Text Solution

    |

  7. A wheel is rotating freely at an angular speed of 800 rev/min on a sha...

    Text Solution

    |

  8. wheel rotates with angular velocity 500 r.p.m. on a shaft. Second iden...

    Text Solution

    |

  9. If the radius of the earth contracts to half of its present value with...

    Text Solution

    |

  10. Two discs of moments of inertia I1 and I2 about their respective axes,...

    Text Solution

    |

  11. A pot-maker rotates pot-making wheel of radius 3 m by applying a force...

    Text Solution

    |

  12. Assertion: A solid cylinder of mass m and radius r rolls down an incli...

    Text Solution

    |

  13. The moment of interia of a body depends upon

    Text Solution

    |

  14. If radius of solid sphere is doubled by keeping its mass constant, the...

    Text Solution

    |

  15. Two circular discs A and B of equal masses and thicknesses. But are ma...

    Text Solution

    |

  16. Two discs having same mass rotate about the same axes. If p(1) and p(2...

    Text Solution

    |

  17. Five particles of mass 2 kg each are attached to the rim of a circular...

    Text Solution

    |

  18. From a uniform wire, two circular loops are made (i) P of radius r and...

    Text Solution

    |

  19. Three point masses each of mass m are placed at the corners of an equi...

    Text Solution

    |

  20. Assertion: A judo fighter in order to throw his opponent onto the matt...

    Text Solution

    |