According to the textbooks, it takes 1 Jule to move a 1 kg object a 
distance of 1 meter.

On the other hand, once the object has been moved, keeping it stationary 
requires no energy at all. And, indeed, if you take a lump of metal and 
put it on your bookshelf, it requires no energy to make it remain there. 
It just sits there like a lifeless lump of metal.

Now, here's the thing: How much energy does it take to hold a 1 kg lump 
of metal at arm's legnth?

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??

-- 
http://blog.orphi.me.uk/
http://www.zazzle.com/MathematicalOrchid*

Post a reply to this message