- We have linear position $\vec s$, velocity $\vec v$ and acceleration $\vec a$ as well as their equivalent angular position $\vec \theta$, angular velocity $\vec \omega$ and angular acceleration $\vec \alpha$.
- Also, we have linear force $\vec F$ and the equivalent angular version called torque $\vec \tau$.
- It naturally makes sense apart from the linear momentum $\vec p$ to also have an angular momentum. Let’s pick the symbol $\vec L$ for it.
Just like it is tougher to catch than to carry a tomato, it is likewise tougher to grab and stop the out-of-control well-bucket handle than to simple hold it still.
- ‘Get Ready for a Schooling in Angular Momentum’ (web page), Rhett Allain, Wired, 2017, www.wired.com/story/what-is-angular-momentum/ (accessed Mar. 10th, 2020)
- ‘Rotation in space’ (web page), Richard P. Feynman and others, The Feynman Lectures on Physics, ch. 20, 1963, updated on website 2010 by Michael A. Gottlieb and Rudolf Pfeiffer, www.feynmanlectures.caltech.edu/I_20.html (accessed Mar. 10th, 2020)
- ‘Sears and Zemansky’s Univesity Physics with Modern Physics’ (book), Hugh D. Young & Roger A. Freedman, Pearson Education, 13th ed., 2012