This is EJS version of

vector addition.

The applet shows how vector $vec{C}=vec{A}+vec{B}$ was calculated.

1. Calculate X,Y components of vector $vec{A},vec{B}$,

$vec{C}_x=vec{A}_x+vec{B}_x$ and $vec{C}_y=vec{A}_y+vec{B}_y$

2. If you un-check x-y mode:

The sum is equal to sum of parallel components of $vec{A},vec{B}$ in the direction of $vec{C}$,

$vec{C}=vec{A}_p +vec{B}_p$

and the normal component of $vec{A},vec{B}$ always cancel out with each other. i.e.

$vec{A}_n+vec{B}_n=0$ or $vec{A}_n= -vec{B}_n$

You can select to operate in C=A+B , A=C-B or B=C-A mode.

Full screen applet or

Problem viewing java?Add http://www.phy.ntnu.edu.tw/ to exception site list**Press the Alt key and the left mouse button to drag the applet off the browser and onto the desktop.** This work is licensed under a

Creative Commons Attribution 2.5 Taiwan License
- Please feel free to post your ideas about how to use the simulation for better teaching and learning.
- Post questions to be asked to help students to think, to explore.
- Upload worksheets as attached files to share with more users.

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