8.01SC | Fall 2016 | Undergraduate

Classical Mechanics

Week 11: Angular Momentum

33.1 Worked Example - Angular Momentum of 2 Rotating Point Particles

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Two identical particles of mass \(\displaystyle m\) move in a circle of radius \(\displaystyle R\), \(\displaystyle 180^ o\) out of phase, at an angular velocity \(\displaystyle \vec{\omega } = \omega _ z\hat{k}\) in a plane parallel to but a distance \(\displaystyle h\) above the x-y plane. Treat the two particles as a system.

Calculate \(\displaystyle \vec{L}_ S\), the angular momentum of the system about point \(\displaystyle S\). Express your answer in terms of \(\displaystyle m\), \(\displaystyle R\), \(\displaystyle h\), \(\displaystyle \omega _ z\), \(\displaystyle \hat{k}\), and \(\displaystyle \hat{r}\) as needed.

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