In an orbital motion,the angular momentum vec | vedclass

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(D) The angular momentum $\vec{L}$ of a particle in orbital motion is defined by the cross product of its position vector $\vec{r}$ and its linear mom

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perpendicular to the orbital plane

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(D) The angular momentum $\vec{L}$ of a particle in orbital motion is defined by the cross product of its position vector $\vec{r}$ and its linear momentum $\vec{p}$,given by $\vec{L} = \vec{r} 	imes \vec{p}$.By the definition of the cross product,the resulting vector $\vec{L}$ is always perpendicular to the plane containing both $\vec{r}$ and $\vec{p}$.Since both the position vector and the linear momentum vector lie within the orbital plane,the angular momentum vector $\vec{L}$ must be perpendicular to the orbital plane. This is consistent with the right-hand rule,where the direction of $\vec{L}$ points along the axis of rotation.

In an orbital motion,the angular momentum vector is

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