The direction of angular acceleration of a bo | vedclass

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(A) Angular acceleration $\vec{\alpha}$ is defined as the rate of change of angular velocity $\vec{\omega}$,i.e.,$\vec{\alpha} = \frac{d\vec{\omega}}{

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perpendicular to the plane of the paper

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(A) Angular acceleration $\vec{\alpha}$ is defined as the rate of change of angular velocity $\vec{\omega}$,i.e.,$\vec{\alpha} = \frac{d\vec{\omega}}{dt}$.Since the body is moving in a circle in the plane of the paper,the angular velocity vector $\vec{\omega}$ is directed perpendicular to the plane of the paper (along the axis of rotation) according to the right-hand rule.Consequently,the change in angular velocity $d\vec{\omega}$ also occurs along the axis of rotation.Therefore,the direction of angular acceleration $\vec{\alpha}$ is also perpendicular to the plane of the paper.

The direction of angular acceleration of a body moving in a circle in the plane of the paper is

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