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.


-- 

Best Regards,
	Stephen

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