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Illustration Orbital angular momentum and velocity of a mass during a circular motion

Orbital angular momentum and orbital velocity of a mass during a circular motion
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A body, which can be assumed to be point-shaped, has a mass \( m \) and moves on a circular path with the tangential velocity \( \class{brown}{\boldsymbol{v}} \). The circular path has the radius \( \boldsymbol{r} \).

Due to the circular motion, the body has an orbit angular momentum \( \class{green}{\boldsymbol{L}} \) that is perpendicular to the radius vector \( \boldsymbol{r} \) and the tangential velocity \( \class{brown}{\boldsymbol{v}} \).