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February 19th, 2019, 05:53 PM  #1 
Newbie Joined: Feb 2019 From: Canada Posts: 1 Thanks: 0  State the single vector equal to each of the following
In parallelogram EFGH, EF=u and FG=v. State a single vector equal to each of the following. a) u+v b) uv c) uv d) vu Last edited by weather23; February 19th, 2019 at 06:47 PM. Reason: forgot to add the rest of the question 
February 19th, 2019, 06:41 PM  #2 
Global Moderator Joined: Dec 2006 Posts: 20,828 Thanks: 2160 
$\vec{HG}$ and $\vec{EH}$

February 19th, 2019, 09:26 PM  #3 
Senior Member Joined: Sep 2015 From: USA Posts: 2,500 Thanks: 1372 
a) $\vec{u}+\vec{v}$ position $\vec{v}$ so that it starts at $E$. Hopefully it's clear that $\vec{u}+\vec{v}=\vec{EG}$ b) $\vec{u}\vec{v}$ flip $\vec{v}$ the other direction position $\vec{u}$ so that it starts at $H$ similar to (a) $\vec{u}\vec{v} = \vec{HF}$ can you do the remaining two? 
February 20th, 2019, 04:34 AM  #4 
Global Moderator Joined: Dec 2006 Posts: 20,828 Thanks: 2160 
In each case, the answer corresponds to some diagonal of the parallelogram.


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equal, single, state, vector 
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