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If the resultant external torque acting ...

If the resultant external torque acting on a body is zero, then angular momentum of the body

A

Equal in direction

B

Equal in magnitude

C

Both (a) and (b)

D

Neither (a) nor (b)

Text Solution

Verified by Experts

The correct Answer is:
C
`tau= (d vec(L))/(dt) rArr (d vec(L))/(dt) = 0 rArr vec(L)`= constant
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Knowledge Check

  • 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.

  • If the torque on a body is zero, then?

    A
    `Jomega=constant`
    B
    `Iomega=constant`
    C
    `(Iomega^2)/2=constant`
    D
    `(mv^2)/2=constant`

  • The torque acting on a body is the rotational analogue of

    A
    mass of the body
    B
    linear kinetic energy of the body
    C
    linear velocity of the body
    D
    force in linear motion