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The angular momentum of a moving body r...

The angular momentum of a moving body remains constant if

A

net external force is applied

B

net external torque is applied

C

net pressure is applied

D

net external torque is not applied .

Text Solution

Verified by Experts

The correct Answer is:
D
When the next external torque acting on a system is zero , the total angular momentum of the system remains constant. Therefore the angular momentum of a moving body remains constant if net external torque is not applied.
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Angular momentum of a body .

Obtain the expression for the angular momentum of a rigid body rotating with a constant angular velocity.

Knowledge Check

  • Total angular momentum of a rotating body remains constant, if the net torque acting on the body is

    A
    zero
    B
    maximum
    C
    minimum
    D
    unity

  • Total angular momentum of a rotating body remains constant, if the net torque acting on the body is

    A
    zero
    B
    maximum
    C
    minimum
    D
    unit

  • The angular momentum of a rigid body is

    A
    the moment of the acting force.
    B
    moment of the momentum.
    C
    moment of the mass.
    D
    moment of the acceleration.

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    Assertion: If linear momentum of a particle is constant, then its angular momentum about any point will also remain constant. Reason: Linear momentum remains constant if F_(n et)=0 and angular momentum remains constant if tau_(n et)=0

    The angular momentum of body remains conserve if :

    Assertion The angular momentum of system always remain constant. Reason For a system, tau_(ext)=(dL)/(dt)=0

    Assertion : If there is no external torque on a body about its centre of mass, then the velocity of the centre of mass remains constant. Reason : The linear momentum of an isolated system remains constant.

    Satement-1: if there is no external torque on a body about its centre of mass, then the velocity of the center of mass remains constant. Statement-2: The linear momentum of an isolated system remains constant.

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