The site contains two applets that demonstrate vector addition using the parallelogram method. The goal is to teach students the basics of vector addition. It allows the user to practice with vectors in the plane and in space using Java based graphical applets.
Type of Material:
Simulation.
Technical Requirements:
A Java-enabled browser.
Identify Major Learning Goals:
To demonstrate, both graphically and numerically, vector addition using the parallelogram rule.
Target Student Population:
College-level students studying topics in vectors and vector addition. It could also be used as supplemental material for Linear Algebra students.
Prerequisite Knowledge or Skills:
College Algebra
Content Quality
Rating:
Strengths:
This site provides a simple and effective illustration of vector addition. The graphical display is very clear. Students can create and move vectors independently, in various positions in the plane. The built-in animation procedure moves the chosen vector to an equivalent vector with an initial point at the origin. An animated parallelogram is then created that illustrates the method. In the 3-D version of the applet, the user can see the projection of a given vector on the X-Y plane while changing the terminal point. In both versions the result of the vector addition is clearly shown in a different color. Numerical information and labeling can be viewed as well.
Concerns:
The procedure is limited to two vectors. Vectors can be chosen so that the resultant vector is not completely contained within the applet window.
Potential Effectiveness as a Teaching Tool
Rating:
Strengths:
As a support tool, instructors can use the site to illustrate textbook examples and homework assignments. Students could benefit from visiting the site and spending 20-30 minutes there. Simple physics problems such as addition of velocities and forces can be given in the context of vector addition, which links this site to potential applications and student assignments.
Concerns:
It would be beneficial for the site to illustrate vector subtraction as well.
Ease of Use for Both Students and Faculty
Rating:
Strengths:
This is a very straightforward applet to use. The average user can begin doing the vector manipulations without reading the brief but clear instructions that are included below each applet.
Concerns:
A simple way to print different plots might be useful
Creative Commons:
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