Home
Class 11
PHYSICS
A gymnast standing on a rotating stool w...

A gymnast standing on a rotating stool with his arms outstretched, suddenly lowers his arms

A

his angular velocity decreases

B

his angular velocity increases

C

his moment of inertia remains same

D

his moment of inertia increases

Text Solution

Verified by Experts

The correct Answer is:
B
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • SYSTEM OF PARTICLES

    NARAYNA|Exercise Level-1(C.W.)|64 Videos

  • SYSTEM OF PARTICLES

    NARAYNA|Exercise Level-II(C.W.)|64 Videos

  • SYSTEM OF PARTICLES

    NARAYNA|Exercise Level-VI|78 Videos

  • PHYSICAL WORLD

    NARAYNA|Exercise C.U.Q|10 Videos

  • SYSTEM OF PARTICLES AND ROTATIONAL MOTION

    NARAYNA|Exercise EXERCISE - IV|39 Videos

Similar Questions

Explore conceptually related problems

A person is standing on a rotating platform, with his arms at his sides. If he stretches his arms, then which of the following statements is correct?

A preson is standing on the centre of a rotating table with his arms outstretched. The table is rotating freely with an angular his hands towards his chest. The moment of inertia reduces to (3)/(5) time the original moment of inertia. Calculate angular speed of the man when he withdraws his hands.

Knowledge Check

  • If a gymnast ,standing on a rotating stool with his arms ant stretched ,suddenly ,owers his arms

    A
    His angular velocity decreases
    B
    His angular velocity remains constant
    C
    His angular velocity remains constant
    D
    His moment of inertia increases

  • If a gymnast sitting on a rotating disc with his arms out stretched suddenly lower his arms, then

    A
    angular velocity decreases
    B
    moment of inertia decreases
    C
    angular velocity remains constant
    D
    angular momentum decreases

  • If a person sitting on a rotating stool with his hands outstretched, suddenly lowers his hands, then his

    A
    Kinetic energy will decrease
    B
    Moment of inertia will decrease
    C
    Angular momentum will increase
    D
    Angular velocity will remain constant

    • Similar Questions

    Explore conceptually related problems

    A man is sitting on a rotating stool with his arms outstretched. If suddenly he folds his arms the angular velocity of the man would

    A person sitting firmly over a rotating stool has his arms stretched. If he folds his arms, his angular momentum about the axis of rotation

    A man, sitting firmly over a rotating stool has his arms streched. If he folds his arms, the work done by the man is.

    A man stands on a rotating platform with his arms stretched holding a 5 kg weight in each hand. The angular speed of the platform is 1.2 rev s^-1 . The moment of inertia of the man together with the platform may be taken to be constant and equal to 6 kg m^2 . If the man brings his arms close to his chest with the distance n each weight from the axis changing from 100 cm to 20 cm . The new angular speed of the platform is.

    A man standing at the centre of a rotating table, with his hands stretched outwards. The table is rotating at the rate of 30 rev/minute. If the man brings his hands towards his chest and thereby reduces his moment of inertia to (3)/(5) times of its original moment of inertia, then the number of revolutions performed by the rotating table per minute will be

    Home
    Profile