When a mass is rotating in a plane about a fixed point, its angular momentum is directed along (...

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When a mass is rotating in a plane about a fixed point, its angular momentum is directed along
(1) the radius
(2) the tangent to orbit
(3) line at an angle of \( 45^{\circ} \) to the plane of rotation
(4) the axis of rotation
\( \mathrm{P} \)
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