An observer is at point o. A car of mass m traveling at a constant velocity u is about to pass by her from the left as shown in the figure. Treating the car as a particle, determine the angular momentum of the car about the point o.

• A. The magnitude of the angular momentum is $\left\vert\overrightarrow{L}\right\vert=sm\left\vert\overrightarrow{u}\right\vert$The direction of the angular momentum is into the plane of the screen.
• B. The magnitude of the angular momentum is $\left\vert\overrightarrow{L}\right\vert=sm\left\vert\overrightarrow{u}\right\vert$The direction of the angular momentum is out of the plane of the screen.
• C. The magnitude of the angular momentum is $\overrightarrow{L}=\frac{sm}{\left\vert\overrightarrow{u}\right\vert}$The direction of the angular momentum is into the plane of the screen.
• D. The angular momentum is zero.

Answer: (A)