March 20th, 2018, 09:25 AM  #1 
Member Joined: Sep 2011 Posts: 99 Thanks: 1  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.

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 $p\cdot k = p_z$ 

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