Monday, August 18, 2014

EJSS SHM vertical spring mass model for secondary school

EJSS SHM vertical spring mass model for secondary school

based on models and ideas by

  1. lookang http://weelookang.blogspot.sg/2014/02/ejss-shm-model-with-vs-x-and-v-vs-x.html
  2. lookang http://weelookang.blogspot.sg/2010/06/ejs-open-source-simple-harmonic-motion.html?q=SHM
  3. lookang http://weelookang.blogspot.sg/2013/02/ejs-open-source-vertical-spring-mass.html?q=vertical+spring
  4. Wolfgang Christian and Francisco Esquembre http://www.opensourcephysics.org/items/detail.cfm?ID=13103


http://weelookang.blogspot.com/2014/08/ejss-shm-vertical-spring-mass-model-for.html
EJSS SHM vertical spring mass model for secondary school with equilibrium as y=0
https://dl.dropboxusercontent.com/u/44365627/lookangEJSworkspace/export/ejss_model_SHMxvaverticalsensorsecondary/SHMxvaverticalsensorsecondary_Simulation.xhtml
source: https://dl.dropboxusercontent.com/u/44365627/lookangEJSworkspace/export/ejss_src_SHMxvaverticalsensorsecondary.zip
author: lookang
author of EJSS 5.0 Francisco Esquembre

Changes made:

based on feedback by thong.

  1. mass is a circle drawn in pixel to be always the same area drawn
  2. mass is $ m = \rho \frac{4 \pi r^{3}}{3} $
  3. added 3 runs
  4. added amplitude (y)/m and Time (t)/s
  5. added auto y as mass increases during equilibrium
  6. added natural length, Lnatural as variable that does not affect period T
  7. added Diameter of spring, as variable that does not affect period T






http://weelookang.blogspot.com/2014/03/ejss-vertical-spring-model-with-sensor.html
EJSS SHM vertical spring mass model with sensor with equilibrium as y=0
https://dl.dropboxusercontent.com/u/44365627/lookangEJSworkspace/export/ejss_model_SHMxvavertical01/SHMxvavertical01_Simulation.html
source: https://dl.dropboxusercontent.com/u/44365627/lookangEJSworkspace/export/ejss_src_SHMxvavertical01.zip
author: lookang
author of EJSS 5.0 Francisco Esquembre