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quasar987

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## Main Question or Discussion Point

Right or wrong? Specifically, an equation is said to be

[tex]x \rightarrow x \pm v_x t[/tex]

[tex]y \rightarrow y \pm v_y t[/tex]

[tex]z \rightarrow z \pm v_z t[/tex]

[tex]t \rightarrow t[/tex]

doesn't change the equation.

If right, would simply showing that

[tex]x \rightarrow x \pm vt[/tex]

[tex]y \rightarrow y [/tex]

[tex]z \rightarrow z [/tex]

[tex]t \rightarrow t[/tex]

do the trick too?

*Galilean invariant*if a substitution[tex]x \rightarrow x \pm v_x t[/tex]

[tex]y \rightarrow y \pm v_y t[/tex]

[tex]z \rightarrow z \pm v_z t[/tex]

[tex]t \rightarrow t[/tex]

doesn't change the equation.

If right, would simply showing that

[tex]x \rightarrow x \pm vt[/tex]

[tex]y \rightarrow y [/tex]

[tex]z \rightarrow z [/tex]

[tex]t \rightarrow t[/tex]

do the trick too?