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Teaching without words. ...Lao Tzu (570-490 BC)

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 Author Topic: Free Fall modelling with Friction force F = k*v and a plot of Energy vs time  (Read 6258 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 »

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;

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 459 times.) « Last Edit: August 03, 2009, 11:44:14 am by lookang » Logged
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Teaching without words. ...Lao Tzu (570-490 BC)