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 [CBSE PMT (Pre.) 2012]
(a) A line perpendicular to the plane of rotation
(b) The line making an angle of \( 45^{\circ} \) to the plane of rotation
(c) The radius
(d) The tangent to the orbit
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