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### Software Requirements

SoftwareRequirements

 Android iOS Windows MacOS with best with no no need Java need Java support fullscreen? no no Yes Yes cannot work on no mobile browser  understand Java.... no mobile browser  understand Java.... prefer to install Tracker from http://physlets.org/tracker/ prefer to install Tracker from http://physlets.org/tracker/

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### Credits

Author: This email address is being protected from spambots. You need JavaScript enabled to view it.
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### Video

https://youtu.be/ZFyy3LYPVIg   tracker modeling explained by lookang lawrence wee

## model A no force

 http://weelookang.blogspot.sg/2015/06/tracker-motion-of-person-progressive.html Video Download, Download2 author video:  ning, model: lookangwhen fx = 0 , there is no motion, vx =0, note that y = -0.1 is for visualization purposes.

## model B constant speed

 http://weelookang.blogspot.sg/2015/06/tracker-motion-of-person-progressive.html Video Download, Download2 author video:  ning, model: lookangwhen fx = 0 and initial vx = 1.54, there is constant velocity motion, vx =1.54. notice the model is some what correct but not a close enough mathematical representation of the real motion.

 http://weelookang.blogspot.sg/2015/06/tracker-motion-of-person-progressive.html Video Download, Download2 author video:  ning, model: lookangwhen fx = 0 , there is no motion, vx =1.54, note that y = -0.2 is for visualization purposes

## model C accelerate

 http://weelookang.blogspot.sg/2015/06/tracker-motion-of-person-progressive.html Video Download, Download2 author video:  ning, model: lookangwhen fx = 0.965*2 (from data analysis trend line parabolic fit, coefficient of A which is $$\frac{1}{2}a$$) and initial vx = 0.2898 (from data analysis tool of mass A hand), there is constant acceleration motion. notice the model is some what getting better but still not a close enough mathematical representation of the real motion.

$$\frac{1}{2}a$$

 http://weelookang.blogspot.sg/2015/06/tracker-motion-of-person-progressive.html Video Download, Download2 author video:  ning, model: lookangwhen fx = 0.965*2 , and initial vx = 0.2898, there is constant acceleration motion,, note that y = -0.3 is for visualization purposes

## model D accelerate fx = 0.965*2 N for t = 0 to 0.8 s and constant speed v =1.83 m/s for t> 0.8 s

 http://weelookang.blogspot.sg/2015/06/tracker-motion-of-person-progressive.html Video Download, Download2 author video:  ning, model: lookangwhen fx = if(t<0.8,0.965*2,0)  (computational thinking and mathematical demonstrating newton's 2nd and 1st law together) and initial vx = 0.2898 (from data analysis tool of mass A hand), there is constant acceleration motion. notice the model a close enough mathematical representation of the real motion.

 http://weelookang.blogspot.sg/2015/06/tracker-motion-of-person-progressive.html Video Download, Download2 author video:  ning, model: lookangwhen fx = if(t<0.8,0.965*2,0) , and initial vx = 0.2898, there is constant acceleration motion,, note that y = -0.4 is for visualization purposes

Tracker Motion of Person Progressive Model Building Pedagogy is made clear by lookang.
many thanks to the Open Source Physics community, +Douglas Brown and many more of them