NTNUJAVA Virtual Physics LaboratoryEnjoy the fun of physics with simulations! Backup site http://enjoy.phy.ntnu.edu.tw/ntnujava/
April 24, 2019, 07:29:25 pm
 Welcome, Guest. Please login or register.Did you miss your activation email? 1 Hour 1 Day 1 Week 1 Month Forever Login with username, password and session length

 Home Help Search Login Register
"If I have a thousand ideas and only one turns out to be good, I am satisfied." ..."Alfred Nobel(1833-1896, Swedish inventor, chemist, philanthropist)"

 Pages: [1]   Go Down
 Author Topic: Free Fall Cartesian with friction 2D Wolfgang Christian and Francisco Esquembre  (Read 5817 times) 0 Members and 1 Guest are viewing this topic. Click to toggle author information(expand message area).
lookang
Moderator
Hero Member

Offline

Posts: 1792

http://weelookang.blogspot.com

 « Embed this message on: November 27, 2008, 02:27:46 pm » posted from:SINGAPORE,SINGAPORE,SINGAPORE

Friction
The model assumes that energy is lost only during the floor collision. Modify the differential equation to include energy loss due to air friction. This energy loss can be modeled by including a friction (fluid drag) force Ffriction that is proportional to the velocity:
Ffriction = - b v .
Because drag is a vector force it will affect the ball's motion in both the x and y directions. Compare the effect of friction in this activity with the one-dimensional Free Fall activity.

How i implement the model is

1. add variable k
2. add variable mass
3. dvy/dt = -g - k/mass*vy
4. dvx/dt = - k/mass*vx

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!
 freefallfriction.PNG (22.94 KB, 1024x736 - viewed 447 times.) « Last Edit: August 03, 2009, 11:41:36 am by lookang » Logged
 Pages: [1]   Go Up
"If I have a thousand ideas and only one turns out to be good, I am satisfied." ..."Alfred Nobel(1833-1896, Swedish inventor, chemist, philanthropist)"
Jump to:

 Related Topics Subject Started by Replies Views Last post Free Fall modelling with Friction force F = k*v Collaborative Community of EJS lookang 0 9505 November 26, 2008, 01:13:20 pm by lookang Free Fall modelling with Friction force F = k*v and a plot of Energy vs time Collaborative Community of EJS lookang 0 5812 November 26, 2008, 02:07:29 pm by lookang Free Fall 3D "Modeling Physics with Easy Java Simulations" by Wolfgang/Francisco Collaborative Community of EJS lookang 1 15061 August 03, 2009, 10:18:08 am by lookang Free Fall Cartesian by Wolfgang Christian and Francisco Esquembre Collaborative Community of EJS lookang 3 8561 January 05, 2019, 02:21:09 pm by vivozi 3D rotational pendulum also known as Furuta's pendulum by Francisco Esquembre Dynamics lookang 6 16366 February 26, 2019, 02:26:43 am by laurenfoster
Page created in 0.052 seconds with 23 queries.since 2011/06/15