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Easy Java Simulations (2001- ) => Collaborative Community of EJS => Topic started by: engrg1 on February 08, 2012, 10:32:37 am



Title: Remixed Inclide Plane for use in Elementary School
Post by: engrg1 on February 08, 2012, 10:32:37 am
I have remixed this Incline Ramp written by Francisco Esquembre for use in Elementary School . Thanks to Francisco Esquembre  for the code. The original code can be found @ http://www.opensourcephysics.org/items/detail.cfm?ID=9973 (http://www.opensourcephysics.org/items/detail.cfm?ID=9973)




Title: Re: Remixed Inclide Plane for use in Elementary School
Post by: engrg1 on February 08, 2012, 10:46:29 am
Changes Made:

1. Disable step button when the end of the ramp is reached.
2.Indicate the height of the ramp
3. Resolve bug if end of the ramp is reached.
4. Change the inclination angle to the height of the ramp
5. Specify the material (hard code the coefficient of friction)
6. Show velocity/
7. Remove the unncessary forces

Maybe can consider using that for accessement. Let the students design an experiment to find out which material has the most friction.


Title: Re: Remixed Inclide Plane for use in Elementary School
Post by: engrg1 on February 10, 2012, 08:59:51 am
My version 2. Made some modifications.


Title: Re: Remixed Inclide Plane for use in Elementary School
Post by: engrg1 on February 16, 2012, 10:15:07 pm
Made some modifications. Feel free to give comments.
Can anyone give me some possible values of static and kinetic coefficient of friction? I am trying to make this applet as realistic as possible.
Thank you!


Title: Re: Remixed Inclide Plane for use in Elementary School
Post by: Fu-Kwun Hwang on February 16, 2012, 11:46:16 pm
If an object just about to slide down from an incline plane (increase the angle slowly),
 then the $tan\theta$ value for that angle will be the static friction between that object and the incline plane.
So normally, the value is between 0-1.

Friction coefficient of tires on the road : initial value is 0.8

    Typical value of tires   static coefficient    kinetic coefficient
    auto tires on dry concrete       1.0                   0.7-0.8
    auto tires on wet concrete       0.7                      0.5
    auto tires on icyconcrete         0.3                      0.02


Title: Re: Remixed Inclide Plane for use in Elementary School
Post by: engrg1 on February 20, 2012, 12:58:43 pm
My 3rd Version


Title: Re: Remixed Inclide Plane for use in Elementary School
Post by: engrg1 on February 20, 2012, 01:09:48 pm
Thank, Prof Hwang !


Title: Re: Remixed Inclide Plane for use in Elementary School
Post by: engrg1 on February 22, 2012, 04:11:12 pm
I have attached the picture so that it can appear on the "front page".


Title: Re: Remixed Inclide Plane for use in Elementary School
Post by: Fu-Kwun Hwang on February 22, 2012, 10:46:35 pm
It only work if the attached file is bounded to the first posted message.
Try to create a new topic and attach the image at the same time, and try to use "upload EJS jar file" option to upload the jar file.


Title: Re: Remixed Inclide Plane for use in Elementary School
Post by: engrg1 on February 23, 2012, 07:53:37 am
Thanks! Prof Hwang.


Title: Re: Remixed Inclide Plane for use in Elementary School
Post by: lookang on March 12, 2012, 03:32:31 pm
I have remixed this Incline Ramp written by Francisco Esquembre for use in Elementary School . Thanks to Francisco Esquembre  for the code. The original code can be found @ http://www.opensourcephysics.org/items/detail.cfm?ID=9973 (http://www.opensourcephysics.org/items/detail.cfm?ID=9973)



Hi engrg1!!

i have added in first post for the picture to appear :)