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"A F = <0,0,10> is exerted at the point (1,1,1)

what is the moment about the X axis?"

i know the answer is <sqrt(3),sqrt(3),sqrt(3),> DOT (<1,1,1>x<0,0,10>)

but the physical meaning of that escapes me.

in what applications would an axis be more useful than a point?

thanks!