NTNUJAVA Virtual Physics Laboratory
Enjoy the fun of physics with simulations!
Backup site http://enjoy.phy.ntnu.edu.tw/ntnujava/
October 21, 2018, 11:42:08 am *
Welcome, Guest. Please login or register.
Did you miss your activation email?

Login with username, password and session length
 
   Home   Help Search Login Register  
To live close to great minds is the best kind of education. ..."John Buchan (1875~1940 Scotticsh historian, Governor General of Canada)"
Google Bookmarks Yahoo My Web MSN Live Netscape Del.icio.us FURL Stumble Upon Delirious Ask FaceBook

NTNUJAVA Virtual Physics Laboratory
Enjoy the fun of physics with simulations!
Backup site http://enjoy.phy.ntnu.edu.tw/ntnujava/ > Easy Java Simulations (2001- ) > Questions related to EJS > Air Drag
Pages: [1]   Go Down
« previous next »
  Print  
Author Topic: Air Drag  (Read 5931 times)
0 Members and 1 Guest are viewing this topic. Click to toggle author information(expand message area).
ahmedelshfie
Ahmed
Hero Member
*
Offline Offline

Posts: 954
«
Embed this message
on: October 27, 2010, 11:40:20 pm » posted from:SAO PAULO,SAO PAULO,BRAZIL
Hello prof
Could some help about Air Drag applet,have some bugs i tried solve but didn't have luck!
Have wrong in K1,K2 and graphic not totally right have many wrongs.
When i set value in k1 or k2 or both applet move so fast with a big error!
Help prof  Cry
Thanks


* Air Drag.gif (18.17 KB, 940x437 - viewed 316 times.)
*** There are 1 more attached files. You need to login to acces it!
Logged
Fu-Kwun Hwang
Administrator
Hero Member
*****
Offline Offline

Posts: 3080



WWW
«
Embed this message
Reply #1 on: October 29, 2010, 05:00:54 pm » posted from:,,Taiwan
Please at least provide the parameters which you think it does not function preporly.
Is it the same in my original applet or it only shown in your modified version?
Logged
ahmedelshfie
Ahmed
Hero Member
*
Offline Offline

Posts: 954
«
Embed this message
Reply #2 on: October 29, 2010, 05:25:24 pm » posted from:SAO PAULO,SAO PAULO,BRAZIL
Hi prof
As long time ago you help me modified your original applet but,
Have many days i was check applet together teacher physic, i find many bugs i tried to solve this bugs.
Have bugs in k1,k2,graphic of x,y
Because it i ask if you could check applet and help me solve this bugs.
Thanks prof
Logged
Fu-Kwun Hwang
Administrator
Hero Member
*****
Offline Offline

Posts: 3080



WWW
«
Embed this message
Reply #3 on: October 29, 2010, 05:47:07 pm » posted from:,,Taiwan
Would you explain what do you mean by something wrong in graphic of x-y
and what kind of bug in k1,k2?
What kind of values you have tried which you think it move too fast?

I need to know the parameters you have tried which you suspect there is something wrong,
so that I can re-product the same result you found.
Logged
ahmedelshfie
Ahmed
Hero Member
*
Offline Offline

Posts: 954
«
Embed this message
Reply #4 on: October 29, 2010, 06:02:07 pm » posted from:SAO PAULO,SAO PAULO,BRAZIL
About bugs K1,K2 normally when i run applet appear value of k1,k2 zero but when i change
Value for example k2 i change value to 1,000000 to click Play so the mass move so fast and appear
Error in x,y value beside time, about graphic when i run applet still applet finish running i look to value of x,y
And check graphic of x and y i find different but i think wrong only in y, last thing is the mass after i set value of angle and velocity
I run applet so mass move normally still end when touch another point on other side must stop but not stop continue move but no always some times stop i think is like relationship between value of angle and velocity.

* Bug.gif (17.91 KB, 968x411 - viewed 469 times.)
« Last Edit: October 29, 2010, 06:08:32 pm by ahmedelshfie » Logged
Fu-Kwun Hwang
Administrator
Hero Member
*****
Offline Offline

Posts: 3080



WWW
«
Embed this message
Reply #5 on: October 29, 2010, 08:21:24 pm » posted from:,,Taiwan
There is nothing wrong with the code.

It is because you have too large value for k1,k2

The resistor force is assume to be F=K1*V+K2*V^2 and the mass is assumed to be 1.
K1 and K2 has to be much smaller than 1.
for k2=0.1 it is not an object moving in air. It is an object moving in densed fluid.
Logged
motazibrahim
Newbie
*
Offline Offline

Posts: 2
«
Embed this message
Reply #6 on: November 05, 2010, 01:48:18 am » posted from:SAO PAULO,SAO PAULO,BRAZIL
Thank you prof for help, so every thing alright and not have any wrong like i think.
This a count my brother i was check is still work or no
Ahmed
Thanks Grin
« Last Edit: November 05, 2010, 01:52:02 am by motazibrahim » Logged
Pages: [1]   Go Up
  Print  
To live close to great minds is the best kind of education. ..."John Buchan (1875~1940 Scotticsh historian, Governor General of Canada)"
« previous next »
 
Jump to:  


Related Topics
Subject Started by Replies Views Last post
ball moving with spin /drag
Request for physics Simulations 		Fu-Kwun Hwang 1 7464 Last post February 21, 2008, 02:24:12 pm
by Fu-Kwun Hwang
X(t), V(t) and a(t) plots : drag x to view v(t)/a(t) or set constant a
Kinematics 		Fu-Kwun Hwang 0 8962 Last post April 04, 2009, 03:17:39 pm
by Fu-Kwun Hwang
X(t), V(t) and a(t) plots : drag x to view v(t)/a(t) or set constant a
kinematics 		ahmedelshfie 0 4252 Last post June 24, 2010, 07:46:25 pm
by ahmedelshfie
Air drag
Dynamics 		Fu-Kwun Hwang 0 4452 Last post February 27, 2011, 01:28:57 pm
by Fu-Kwun Hwang
Air drag
dynamics 		ahmedelshfie 0 3071 Last post May 23, 2011, 05:50:05 pm
by ahmedelshfie
Powered by MySQL Powered by PHP Powered by SMF 1.1.13 | SMF © 2006-2011, Simple Machines LLC Valid XHTML 1.0! Valid CSS!
Page created in 0.144 seconds with 22 queries.since 2011/06/15