Question

A mass $m$ is moving with a constant velocity along a line parallel to the x-axis, away from the origin. Its angular momentum with respect to the origin

• A. is zero
• B. remains constant
• C. goes on increasing
• D. goes on decreasing

Answer 1

The correct option is B remains constant

Angular momentum is given by:
$\overrightarrow{L}=\overrightarrow{r}\times \overrightarrow{p}$

The direction of angular momentum is into the plane of paper and constant with time..

About point O, $|L_O|=m\left(OB\right)v$

$L_O=mva=constant$