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# 1 28-09-2005 , 10:46 AM

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Join Date: Apr 2004
Posts: 4

#### Newton's pendulum

Hi all!

I try to create a simulation of the newton's pendulum with the dynamics and I encounter problems!

I've created five spheres with a gravity field and a nail constraint! When I launch my simulation, the spheres collide themselves correctly but not as the same way as a Newton's pendulum!

All the spheres are moving how you can see below in my simulation!
With a Newton's pendulum, just the first and the last sphere move!

Here is my test: https://homepage.hispeed.ch/cireb/Video/testnewton.mov

What I want to do: https://www.ap.stmarys.ca/demos/conte...endulum_HR.wmv

Thanks!

# 2 28-09-2005 , 12:57 PM

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Join Date: Oct 2002
Location: London, UK
Posts: 2,800
do they have their mass attribute set correctly? what I would do is use mass and also instead of gravity try a uniform field (gravity ignores mass and applies the force no matter what, uniform takes into account the mass of the object.) good tute on it here: https://www.thegnomonworkshop.com/tut...s_uniform.html

A

Technical Director - Framestore

IMDB

# 3 28-09-2005 , 01:41 PM

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Join Date: Apr 2004
Posts: 4

I've tried the uniform field and the result is a little bit better! But unfortunately the middle spheres are still moving!

do they have their mass attribute set correctly?

I think yes!
Here is my project file: https://homepage.hispeed.ch/cireb/Newton.mb

If you can see it, it would be very nice of you!

Thanks!

Last edited by hollw man; 29-09-2005 at 11:17 AM.

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