5 tube balancing argument

Chromosome Terror abrdlher at reading.ac.uk
Sun Oct 13 19:45:34 EST 1996


On Wed, 9 Oct 1996, Zhiyong Zhao wrote:

> You can balance 3 tubes in a 12-hole rotor. However, when you add another 2 tub
> es in you actually disturb the first balance and creat a new unbalanced situati
> on. So, each 3-tube or 2-tube group can be balanced, but putting them together
> you will have a totally different thing.

Not at all!!!
If you have a balanced situation (sum of force vectors equals zero) and
you add another balanced situation (sum equals zero), adding both still
results in zero: they are balanced, of course!
Just think of it: the three are balanced when placed in the corners of an
equilateral triangle. Then you add one more anywhere, and another one
exactly opposite, these two will cancel eachother out...

Nach





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