PlanetPhysics/Position Vector
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In the space , the vector directed from the origin to a point \,\, is the position vector of this point.\, When the point is variable, represents a vector field and its length a scalar field.
The simple formulae
are valid, where is the unit vector having the direction of .
If\, Failed to parse (SVG (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") from server "http://localhost:6011/en.wikiversity.org/v1/":): {\displaystyle \vec} \, is a constant vector,\, \, a vector function and\, \, is a twice differentiable function, then the formulae
- Failed to parse (syntax error): {\displaystyle \nabla(\vec\cdot\!\vec{r}) = \vec}
hold.
All Sources[edit | edit source]
References[edit | edit source]
- ↑ {\sc K. V\"ais\"al\"a:} Vektorianalyysi . \,Werner S\"oderstr\"om Osakeyhti\"o, Helsinki (1961).