quote:
Originally posted by Felu
quote:
Originally posted by CookieRevised
This is exactly the same question as what would fall faster in a vacuum: 10Kg feathers or 10Kg lead. The answer is, because there is no friction (air resistance) to take in account: they fall at the same speed. In the real world 10Kg feathers would fall slower because of the air resistance/friction.
What has mass got to do with acceleration due to gravity? In a vacuum, even 1g of feather would fall in the same time as 10kg of lead, if dropped from the same height.
yes, but they are made the same weight exactly to rule out the difference in weight; to keep things simple when you do the 'experiment' in a non-vacuum environment.
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Volv, reading your example made me see the error, thanks. (wasn't such a crappy example as you thought afterall
). So I stand corrected...
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But I now think, and even convinced, that the chain wouldn't move at all actually, no matter what the angles are (so even no math or equations needed)
The whole thing is like a static block.
Think about it, what if you have something hanging from below connecting both ends of the chain. It would mean that there would be a 'force' pulling on each side eaqually from below no (so it doesn't matter if it is there or not)? So, if the top piece of the chain would move to some direction, it means the bottom part would move too (in the opposite direction). If that would happen, you would have something like a perpetual machine! Which isn't possible becaue there is no force to maintain it... hence, it would never move, no matter the angles and the lengths of the slopes, as long as both the 'bottom' parts are on a horizontal plane. Or am I missing something again (quite possible though, I'm not that awake anymore)?...
EDIT: wait... ermmm.
EDIT2: yeah, no movement...
EDIT3: ermm... hang on ... blah.... I give up... and now I can't sleep thinking about this all morning (8am already)
* CookieRevised shoots SonicSam for asking such questions...
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