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Questions about aplications of integral.

Thread starter erogol
Start date Feb 28, 2009
Tags

Integral

Feb 28, 2009

#1

erogol

I have some questıons about aolıcatıons of ıntegral can you help me?

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Feb 28, 2009

#2

yyat

Hi erogol,

Since the document you linked to is titled "Homework", this should probably be posted in the "Homework & Coursework Questions" subforum. Also, what exactly is your question regarding integrals?

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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