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Elastic Collision

By Luigi Fortunati on Wed Feb 11 22:30:55 2026

Latest reply by Mikko on Sat Feb 28 10:43:18 2026
Collision, Energy, and Force

By Luigi Fortunati on Tue Feb 17 19:23:28 2026

Latest reply by Luigi Fortunati on Tue Feb 24 22:23:20 2026
Two Rotating Planets

By Luigi Fortunati on Fri Feb 6 18:00:39 2026

Latest reply by Luigi Fortunati on Sat Feb 7 22:22:30 2026
Tug of War

By Luigi Fortunati on Fri Dec 19 01:30:40 2025

Latest reply by Luigi Fortunati on Thu Jan 22 22:55:13 2026
The Two Phases of the Collision

By Luigi Fortunati on Sat Jan 17 18:09:35 2026

Latest reply by Luigi Fortunati on Sat Jan 17 18:09:35 2026
Numbers as Symbolic Constructs

By street on Sun Dec 14 05:51:37 2025

Latest reply by street on Sun Dec 14 05:51:37 2025
Re: The momentum - a cotangent vector?

By ram on Fri Dec 5 13:41:20 2025

Latest reply by ram on Fri Dec 5 13:41:20 2025
Acting forces

By Luigi Fortunati on Sat Nov 22 12:18:46 2025

Latest reply by Luigi Fortunati on Mon Dec 1 11:09:10 2025
Black holes passing through humans and a planet

By Thomas Koenig on Sun Nov 23 23:07:44 2025

Latest reply by Thomas Koenig on Sun Nov 23 23:07:44 2025
Inertia and the Principles of Dynamics

By Luigi Fortunati on Sun Nov 2 12:52:55 2025

Latest reply by Jonathan Thornburg [remove -color to reply] on Tue Nov 11 00:02:12 2025
Towed car

By Luigi Fortunati on Sat Sep 27 22:43:24 2025

Latest reply by Luigi Fortunati on Sun Jun 29 13:18:02 2025
Is force transmitted?

By Luigi Fortunati on Sat Oct 11 17:15:48 2025

Latest reply by pa on Wed Oct 15 12:23:05 2025
Two equal and opposite forces

By Luigi Fortunati on Mon Sep 29 21:40:54 2025

Latest reply by Luigi Fortunati on Mon Sep 29 21:40:54 2025
The Lindblad Picture. Solving The Riddles Of Time And Quantum

By Lydia Marie Williamson on Thu Aug 28 09:05:40 2025

Latest reply by Jos Bergervoet on Fri Sep 19 13:17:54 2025
Anti Gravity

By street on Wed Sep 10 09:20:47 2025

Latest reply by street on Wed Sep 10 09:20:47 2025
The dynamometer

By Luigi Fortunati on Thu Aug 7 11:46:25 2025

Latest reply by Luigi Fortunati on Sat Aug 9 22:11:54 2025
Where's "left"?

By ram on Sat Aug 2 21:57:54 2025

Latest reply by ram on Tue Aug 5 06:43:19 2025
The isolated system

By Luigi Fortunati on Fri Jul 25 14:36:16 2025

Latest reply by Luigi Fortunati on Thu Jul 31 06:39:40 2025
Rate of Change

By Street on Sun Jul 27 11:18:58 2025

Latest reply by Street on Sun Jul 27 11:18:58 2025
Re: Action and reaction

By Mikko on Sat Jul 5 13:43:52 2025

Latest reply by Luigi Fortunati on Wed Jul 2 17:50:32 2025
Re: derivation of Newton's 3rd law from 2nd law

By Tom Roberts on Fri Jul 4 19:21:47 2025

Latest reply by Luigi Fortunati on Sat Jul 5 12:01:37 2025
Re: The experiment -- action + reaction

By Mikko on Sat Jul 5 09:42:33 2025

Latest reply by Mikko on Sat Jul 5 09:42:33 2025
The experiment

By Luigi Fortunati on Sun Jun 1 08:10:52 2025

Latest reply by Luigi Fortunati on Tue Jun 17 21:03:26 2025
The rope

By Luigi Fortunati on Wed May 21 10:03:11 2025

Latest reply by Luigi Fortunati on Tue May 27 15:00:28 2025
General relativity: literature request on mixture theory

By pglpm on Sun May 25 07:57:17 2025

Latest reply by pglpm on Sun May 25 07:57:17 2025
I ask mathematicians for help

By Luigi Fortunati on Tue May 13 13:48:13 2025

Latest reply by Mikko on Sat May 17 10:09:03 2025
Converging forces

By Luigi Fortunati on Sun Apr 27 22:19:48 2025

Latest reply by Luigi Fortunati on Sun May 4 12:11:10 2025
The spring

By Luigi Fortunati on Thu Apr 17 09:40:06 2025

Latest reply by Luigi Fortunati on Sat Apr 19 23:53:40 2025
Newton's Third Law and Inertia

By Luigi Fortunati on Sat Apr 5 20:31:24 2025

Latest reply by Luigi Fortunati on Tue Apr 8 16:01:02 2025
The hidden error

By Luigi Fortunati on Thu Mar 27 08:26:11 2025

Latest reply by Mikko on Wed Apr 2 12:52:36 2025
The "net" force

By Luigi Fortunati on Sat Mar 22 16:31:37 2025

Latest reply by Luigi Fortunati on Tue Mar 25 21:22:41 2025
Newton e Hooke

By Luigi Fortunati on Sun Jan 26 08:51:04 2025

Latest reply by Luigi Fortunati on Sun Mar 16 21:28:32 2025
"Testing Gravity 2025" conference: day 1 highlights

By Jonathan Thornburg [remove -color to reply] on Tue Feb 4 08:33:00 2025

Latest reply by Luigi Fortunati on Tue Feb 4 23:46:38 2025
Newton's Gravity

By Luigi Fortunati on Tue Dec 31 14:03:32 2024

Latest reply by Luigi Fortunati on Fri Jan 17 08:05:31 2025
The Elevator in Free Fall

By Luigi Fortunati on Thu Dec 19 22:51:17 2024

Latest reply by Tom Roberts on Mon Jan 13 07:58:29 2025
Re: Newton's 3rd law is wrong

By Tom Roberts on Tue Dec 24 14:36:49 2024

Latest reply by Tom Roberts on Tue Dec 24 14:36:49 2024
electric-car energy model

By Jonathan Thornburg [remove -color to reply] on Sun Dec 22 08:57:10 2024

Latest reply by Jonathan Thornburg [remove -color to reply] on Sun Dec 22 08:57:10 2024