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Re: Pb



I appreciate the responses to the dropping the lead question -- especially
the comments of John Denker. I was having trouble correlating the
ice-skater-into-the-wall situation with the lead-hitting-the-floor
question. After John's comments, I realize that I must have been having a
senile attack.

The key is that the wall/floor does "no" work -- that the body/lead does
the work on itself. Note that if one were to drop a hard steel ball on a
hard floor the story is somewhat different -- except that if the ball and
floor were real, the same amount of work would be done on the object by the
time the object came to rest and would be heated just the same. A nice
thought experiment.

Thanks all


Jim Green
mailto:JMGreen@sisna.com
http://users.sisna.com/jmgreen