My Math Forum Vectors Help

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March 20th, 2018, 09:25 AM   #1
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Joined: Sep 2011

Posts: 99
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Vectors Help

Hi, I have no idea how to do this question. However, I have done up certain portion which is to my best understanding. Help is greatly appreciated.
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 March 20th, 2018, 09:54 AM #2 Senior Member     Joined: Sep 2015 From: USA Posts: 2,530 Thanks: 1390 Looks like you are doing it correctly. You just stopped before grinding through the algebra. Can you compute $p \cdot k,~\|p\|$ ? Hopefully you know that $\|k\|=1$ and that $p\cdot k = p_z$ Thanks from Alexis87

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