Question

When a mass is rotating in a plane about a fixed point, its angular momentum is directed along the

• A. Radius of orbit
• B. Tangent to the Orbit
• C. Line parallel to plane of rotation
• D. Line perpendicular to plane of rotation

Answer 1

The correct option is D Line perpendicular to plane of rotation

$\overrightarrow{L}=m(\overrightarrow{r}\times \overrightarrow{v})$

Thus $\overrightarrow{L}$ lies perpendicular to the plane containing $\overrightarrow{r}$ and $\overrightarrow{v}$ ( OR plane of rotation)