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