November 2nd, 2019, 10:31 AM  #1 
Newbie Joined: Nov 2019 From: New York Posts: 1 Thanks: 0  vector problem
Hi all, Please take a look at the attached image of the problem and if someone could explain where the indicated value came from that would be so very helpful. I got everything but not quite sure why the sqrt2 was inserted towards the end. 
November 2nd, 2019, 10:37 AM  #2  
Newbie Joined: Jun 2016 From: UK Posts: 8 Thanks: 8 Math Focus: Anything but stats :)  Quote:
$F_4 = \sqrt{ F^2_{4x} + F^2_{4y} } = \sqrt{ F^2_{4x} + F^2_{4x}} = \sqrt{2F^2_{4x} } = \sqrt{2}F_{4x}$ hence the $\sqrt{2}$ as a factor. Last edited by RDKGames; November 2nd, 2019 at 10:40 AM.  

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