-=Dark_Angel=-, P.I.14 Apr 2004

That method doesn't work. I have already considered it. My version consisted of lying on your back on a plank of wood, with a pivot placed exactly at your neck. Then place weights on the head side until balanced and then use the fact that the clockwise moment equals the anti-clockwise moment to obtain a value for HEAD. The problem with this method is as follows:

1) You don't know the centre of mass of the head, or of the body (you only know the centre of mass of the Head + Body, which you can find easily by sliding the pivot along the body until balanced)

2) You don't know the weight of the body. Your equation

HEAD = .5(BODY - ADDED)

requires the weight of the BODY. But if you know that, you may as well just weigh yourself, then subtract BODY. Clearly obtaining BODY is the same problem as obtaining HEAD.

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