Equation of Plane Through Origin & Perpendicular to Vector (1,-2,5) • Physics Forums

ineedhelpnow · 2014-08-20T21:57:00+00:00

find the equation of the plane through the origin and perpendicular to the vector (1,-2,5). this is the only relevant equation i have found $a(x-x_0)+b(y-y_0)+c(x-x_0)=0$

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 Equation of Plane Through Origin & Perpendicular to Vector (1,-2,5)

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

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