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"Progress, therfore, is not and accident,¡K" ..."Herbert Spencer(1820-1903, British philosopher)"

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 Author Topic: Free Fall modelling with Friction force F = k*v and a plot of Energy vs time  (Read 5939 times) 0 Members and 1 Guest are viewing this topic. Click to toggle author information(expand message area).
lookang
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 « Embed this message on: November 26, 2008, 02:07:29 pm » posted from:SINGAPORE,SINGAPORE,SINGAPORE

Energy
Add a plot of total energy E(t) to the simple free fall model. Why is the energy plot similar to a plot of radioactive decay? Plots are described in the Ejs manual but note that the Pendulum model in this package includes a plot and can be used as a template for this activity.

My contributions are
1. variable KE
2. variable PE
3. variable TE

4. add fix relations

Code:
KE = 0.5*mass*vy*vy;
PE = mass*g*y;
TE = KE +PE;

5. add plottingPanel

6. add trace, input X = t, input Y = KE , line color = MAGENTA
7. add trace, input X = t, input Y = PE , line color = BLUE
8. add trace, input X = t, input Y = TE , line color = BLACK

9. Change position of DrawingPanel to right
10. Change position of plottingPanel to centre // better view of the graphs called plottingPanel

source code
download the *.jar for using the applet on standalone without internet connection.

Embed a running copy of this simulation

Embed a running copy link(show simulation in a popuped window)
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.
Let's work together. We can help more users understand physics conceptually and enjoy the fun of learning physics!
 freefallfrictionplot.PNG (26.86 KB, 752x470 - viewed 390 times.) « Last Edit: August 03, 2009, 11:44:14 am by lookang » Logged
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"Progress, therfore, is not and accident,¡K" ..."Herbert Spencer(1820-1903, British philosopher)"
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 Related Topics Subject Started by Replies Views Last post Free Fall modelling to understand the Event for ODE Evolution Page Collaborative Community of EJS lookang 2 9200 August 03, 2009, 11:24:15 am by lookang Free Fall modelling with Friction force F = k*v Collaborative Community of EJS lookang 0 9677 November 26, 2008, 01:13:20 pm by lookang Free Fall Cartesian with friction 2D Wolfgang Christian and Francisco Esquembre Collaborative Community of EJS lookang 1 6067 January 05, 2019, 02:22:18 pm by vivozi Ski as example to illustrate the friction force (normal force...etc) Request for physics Simulations Fu-Kwun Hwang 12 27690 August 24, 2011, 12:19:16 pm by melody Relation between friction force, external force, normal force Dynamics Fu-Kwun Hwang 1 14885 July 23, 2009, 04:01:38 pm by lookang
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