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Easy Java Simulations (2001- ) => Collaborative Community of EJS => Topic started by: lookang on July 08, 2010, 09:20:34 pm



Title: Ejs Open Source Circular Motion of mass m attached to a rod java applet
Post by: lookang on July 08, 2010, 09:20:34 pm
Ejs Open Source Horizontal or Vertical Circular Motion of mass m attached to a rod java applet by lookang and Fu-Kwun.
selectable by choosing g = 0 for horizontal , g = 9.81 for vertical circular motion
reference:
http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=190.0
http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=1887.0
mirror here
http://66.7.205.91/~lookangc/index.php?topic=1050.0


Title: Re: Ejs Open Source Vertical Circular Motion of mass m attached to a rod java applet
Post by: lookang on July 08, 2010, 09:21:36 pm
changes

1 added text into the source codes
2 verified the physics of // Torque = I.alpha // mgRsin cta = mR*R alpha in the codes
3 added  weight mg and tension T to represent forces acting on mass m during free body diagram analysis
4 formula string for Fr, Ft and COE during circular motion for fostering deep understanding from a symbolic representation stand point to the macro world view
5 added angular displacement theta, angular velocity omega, time t, centripetal acceleration a-r, tangential acceleration at
6 added tangential velocity v and radial velocity vr
7 change some color scheme
8 add some slider and bars to show values
9 design all variables to be drawn in 2D with checkboxes for sense making
10 decode the newton 2nd law in circular motion with mgRsin cta = mR*R alpha
11 too tired to write compare http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=190.0 with this post to know changes made by me Smiley
12 added plot to show s vs t, v vs t and a vs t in x and y and resultant component from an eariler applet i made http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=745.0
13 added x00 y00 for visualization of position 1 in the formula of WD+ +KE1+PE1 = KE2+PE2+WD-
14 added many standard variables in circular motion
15 made world view draggable mass m ! http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=1895msg6855;topicseen#msg6855
17May2011
added g slider and text for horizontal/vertical view and motion suggestion by leongster

thing to do but can't
a dragg-able mass m , currently to codes seems to be jammed by
x=R*Math.sin(cta);
y=R*Math.cos(cta);