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(B) The angular momentum $L$ of a particle about the origin is given by $L = r 	imes p$,where $r$ is the position vector and $p$ is the linear moment

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will remain constant

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(B) The angular momentum $L$ of a particle about the origin is given by $L = r 	imes p$,where $r$ is the position vector and $p$ is the linear momentum.Alternatively,the magnitude of angular momentum is $L = p 	imes d$,where $d$ is the perpendicular distance from the origin to the line of motion.Here,the mass $m$ moves with constant velocity $v$,so the linear momentum $p = mv$ is constant.The perpendicular distance $d$ from the origin to the line of motion is constant and equal to $a$.Therefore,the angular momentum $L = mv 	imes a = mva$,which is a constant value.

$A$ mass $m$ is moving with a constant velocity $v$ along a line parallel to the $X$-axis. Its angular momentum with respect to the origin or the $Z$-axis is:

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