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Engineering Mechanics

Interactive Graphing Vector Calculator
This is an interactive application that allows you to draw two vectors and perform vector addition and subtraction.
Vector Addition

Unit Vector
An applet that helps you to understand unit vector.

Vector Product - Java Tutorial
To use this tutorial, you will need a "JAVA-enabled" web browser. In this tutorial you will see a drawing; the vector labeled c is being calculated according to your specifications for the vectors a and b . You move these by clicking on their tips and dragging them around the plane with the mouse. You can also "spin the plane" by clicking and dragging on other parts of the picture. Here is another tutorial http://hyperphysics.phy-astr.gsu.edu/hbase/vvec.html#vvc3

Dot Product
Also known as scalar or inner product. Another link
http://hyperphysics.phy-astr.gsu.edu/hbase/vsca.html#vsc1