In uniform circular motion,

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(C) In uniform circular motion $(U.C.M.)$,the speed of the particle is constant,and the radius of the path is constant.Since the angular velocity $\om

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Both the angular velocity and the angular momentum stay constant

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(C) In uniform circular motion $(U.C.M.)$,the speed of the particle is constant,and the radius of the path is constant.Since the angular velocity $\omega = v/r$,it remains constant in both magnitude and direction (perpendicular to the plane of motion).The angular momentum is given by $L = I\omega$,where $I$ is the moment of inertia and $\omega$ is the angular velocity.For a particle in $U.C.M.$ about the center of the circle,$I = mr^2$ is constant and $\omega$ is constant.Therefore,both the angular velocity and the angular momentum remain constant.

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