"Stephen" <mca### [at] aolDOTcom> wrote in message
news:4c54356b@news.povray.org...
> On 31/07/2010 3:21 PM, Orchid XP v8 wrote:

> > According to physics, it would require 0 Jules. However, to keep the
> > object stationary against the force of gravity, the muscles in your arm
> > are having to continually expend chemical energy. But how the **** do
> > you compute how much energy that is??

> Analyse the system and come back with an answer. This is 3rd year high
> school mechanics.

The question has almost nothing to do with mechanics *or* high school. It's
biological/physiological and dependant on many complex factors. You almost
never compute such things by "analysing the system" and working from basic
principles, but you make empirical measurements.

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