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June 24, 2019, 09:21:50 pm

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 Author Topic: Coriolis effect  (Read 16147 times) 0 Members and 1 Guest are viewing this topic. Click to toggle author information(expand message area).
Fu-Kwun Hwang
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 « Embed this message on: June 15, 2013, 11:13:48 am » posted from:,,Satellite Provider

In physics, the Coriolis effect is a deflection of moving objects when they are viewed in a rotating reference frame. In a reference frame with clockwise rotation, the deflection is to the left of the motion of the object; in one with counter-clockwise rotation, the deflection is to the right.

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lookang
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http://weelookang.blogspot.com

 « Embed this message Reply #1 on: February 12, 2018, 12:03:34 pm » posted from:SINGAPORE,SINGAPORE,SINGAPORE

I have recreated a JavaScript version of this simulation
http://iwant2study.org/ospsg/index.php/interactive-resources/physics/02-newtonian-mechanics/05-circle/623-coriolis2d

enjoy!
 Screen Shot 2018-02-12 at 11.24.46 AM (2).png (148.24 KB, 1920x1080 - viewed 323 times.) Logged
lookang
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http://weelookang.blogspot.com

 « Embed this message Reply #2 on: February 18, 2019, 02:40:11 pm » posted from:SINGAPORE,SINGAPORE,SINGAPORE

Dear Prof Hwang,

I think I fixed a bug

//x3=x-y*Math.sin(c); //Rotating with Disk Viewpoint apparent trajectory
//y3=y-y*(1-Math.cos(c));
x3=x+y*Math.sin(c); //Rotating with Disk Viewpoint apparent trajectory MUST change to + instead of -
y3=y-y*(1-Math.cos(c));
//if(y<-R)_initialize();
if(y<-R)_pause(); // added pause by lookang
//vx3=vx-y*w*Math.cos(c)-vy*Math.sin(c);
//vy3=vy-y*w*Math.sin(c)-vy*(1-Math.cos(c));
vx3=vx+y*w*Math.cos(c)+vy*Math.sin(c); // differentiate
vy3=vy-y*w*Math.sin(c)-vy*(1-Math.cos(c));

Then the rotation is correct

 Screenshot 2019-02-18 at 8.52.11 AM (2).png (1847.09 KB, 1920x1080 - viewed 50 times.)  Screenshot 2019-02-18 at 8.53.03 AM (2).png (857.44 KB, 1920x1080 - viewed 44 times.) « Last Edit: February 18, 2019, 02:42:29 pm by lookang » Logged
Fu-Kwun Hwang
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 « Embed this message Reply #3 on: February 19, 2019, 06:29:09 pm » posted from:,,Satellite Provider

Very good. Thanks!

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Last chance is the best chance. ...Wisdom