Vertical Position Problems:
http://www.algebralab.org/practice/practice.aspx?file=Word_VerticalMotion.xml
Possible Projects:
http://algebrafunsheets.com/blog/2011/10/31/quadratic-project-catapults/
http://www.yale.edu/ynhti/curriculum/units/2012/4/12.04.03.x.html#e
How Quadratics are used in real life:
http://plus.maths.org/content/os/issue29/features/quadratic/index
http://plus.maths.org/content/101-uses-quadratic-equation-part-ii
http://www.physicsclassroom.com/class/vectors/u3l2e.cfm
Real Numbers Exist! http://www.math.toronto.edu/mathnet/answers/imagexist.html