Sorry I mean to say why is using the angle by which the wheel has turned more preferable than using time as a parameter. I understand both can be used.
#3
teddyayalew
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0
Sorry I mean to say why is using the angle by which the wheel has turned more preferable than using time as a parameter. I understand both can be used.
I'm reviewing Meirovitch's "Methods of Analytical Dynamics," and I don't understand the commutation of the derivative from r to dr:
$$
\mathbf{F} \cdot d\mathbf{r} = m \ddot{\mathbf{r}} \cdot d\mathbf{r} = m\mathbf{\dot{r}} \cdot d\mathbf{\dot{r}}
$$