**Pre Reqs:** [Intro to Forces](http://scienceblogs.com/dotphysics/2008/09/basics-what-is-a-force.php), [Vectors](http://scienceblogs.com/dotphysics/2008/09/basics ...
Gaps in some of the basic foundational body needs can actually be at the root of many difficulties or make some problems more problematic. Similar to how a tired or hungry toddler will be more grumpy ...
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