Can Improper Integrals Help Solve This Inequality? • Physics Forums

ozgunozgur · 2020-06-03T05:03:07+00:00

This is my method, could you help me to continue?

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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MHB Can Improper Integrals Help Solve This Inequality?

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

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