I've made mistakes where scaling was used but I just assumed that I didn't need it. e.g. a bug walking towards <1,1,1> is scaled to <1/sqrt(3), etc>. Under what kind of conditions/in what kind of problems should vectors be scaled? I know that v/|v| is the unit vector but how do I relate this to problems?(adsbygoogle = window.adsbygoogle || []).push({});

Furthermore, for this problem

A unit vector that is perpendicular to both v = <1; 3; 2> and w = <4; 2; 1> is...

I thought would be vxw, but the answer is (1/(5sqrt(6))vxw. Why was scaling needed here?

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Scaling Vectors

**Physics Forums | Science Articles, Homework Help, Discussion**