Quote:
Originally posted by pretermitted_child
you're constanly adjusting the position of your hand in what is basically an iterative error correction loop. If the loop ever stops, the ruler simply falls over.
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For a minute there, I thought you were talking about the PB.
As for the actual physics involved, thanks. I now have incomprehensible words to use in place of "a computer keeps it upright."
This does not seem to diminish the "duh" factor behind "If it runs out of power, it will no longer stand upright." I do recognize that the CPSC exists to save people from their own stupidity, a monumental folly that NHTSA has never undertaken.