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A rigid body not fixed in some way can h...

A rigid body not fixed in some way can have either pure translation or a combination of translation and rotation.
In rotation about a fixed axis, every particle of the rigid body moves in a circle which lies in a plane perpendicular to the axis and has its centre on the axis.

A

If both assertion and reason are true and reason is the correct explanation of assertion.

B

If both assertion and reason are reason are true but reason is not the correct explanation of assertion.

C

If assertion is true but reason is false

D

If both assertion and reason are false.

Text Solution

Verified by Experts

The correct Answer is:
B
(b) A rigid body fixed at one point or along a line can have only rotational motion. A rigid body not fixed in some way can have either pure translation or a combination of translation and rotation.
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Knowledge Check

  • For a rotating body about fixed axis ,

    A
    every particle moves in a circle
    B
    the linearvelocity is related to angular velocity
    C
    Both (1) and (2) are correct
    D
    Both (1) and (2) are incorrect

  • All the particles of a rigid rotating body move in a circular path when the axis of rotation:-

    A
    passes through any point in the body
    B
    is situated outside the body
    C
    situated any where
    D
    passes through the centre of mass

  • Two thin discs each of mass M and radius r are attached as shown in figure, to from a rigid body. The rotational inertia of this body about an axis perpendicular to the plane of disc B and passing through its centre is : .

    A
    `2 Mr^2`
    B
    `3 Mr^2`
    C
    `4 Mr^2`
    D
    `5 Mr^2`

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    Motion of the rigid body is observed from an inertial frame of reference. Rigid body is rotating with nonuniform angular speed about a fixed vertical axis. If we consider a particle of the rigid body not lying on its axis of rotation then net force acting on this particle is

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    Two thin discs each of mass M and radius r metre are attached to form a rigid body as shown in figure. The rotational inertia of this body about an axis perpendicular to the plane of disc B and passing through its centre is

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