[Squeakland] the concept of mass

[Bert Freudenberg]

On May 9, 2007, at 16:04 , subbukk wrote:

> On Tuesday 08 May 2007 9:11 pm, Paulo Drummond wrote:
>> Hi all,
>>
>> Following "Powerful Ideas..." - the great book by Kim & BJ, I'm
>> trying to introduce the concept of mass (or weight, for simplicity of
>> kid's undestanding), to enhance a project about pendula and energy.
>>
>> Any ideas?
> Excellent idea. This would allow kids to simulate planets, satellites,
> collisions and so on.
>
> Sodaconstructor  (http://www.sodaplay.com) uses just three objects   
> - mass
> (fixed or free), a spring (a stretchable line connecting two  
> masses) and a
> muscle (line connecting masses that stretches and shrinks  
> periodically) - and
> then four controls - gravity, friction, elasticity and an  
> activation wave for
> a muscle - to create very interesting "creatures". Be warned, this  
> is very
> addictive :-).

Check out ODE for Squeak:

	http://languagegame.org:8080/ggame/15

(scroll down a bit to the Etoys section)

- Bert -