Expanding and Factoring: Tips and Tricks for An-1 | Theorem Included • Physics Forums

crazyformath2 · 2009-03-25T01:46:31+00:00

Can someone help me. How would you expand or factor out an-1 Is there a theorem for this?

Thread 'How does time derivative commute from one variable to another?'

I'm reviewing Meirovitch's "Methods of Analytical Dynamics," and I don't understand the commutation of the derivative from r to dr: $$ \mathbf{F} \cdot d\mathbf{r} = m \ddot{\mathbf{r}} \cdot d\mathbf{r} = m\mathbf{\dot{r}} \cdot d\mathbf{\dot{r}} $$

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Expanding and Factoring: Tips and Tricks for An-1 | Theorem Included

Thread 'How does time derivative commute from one variable to another?'

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