posted on Aug, 1 2011 @ 07:53 PM
reply to post by CeeRZ
That's quite fancy. Certainly not a modern miracle...it's pretty much just an overpass with water, but it is pretty cool to see.
As for the physics: I want to point out that, if the water on the river bridge is contained, then the boats do add more weight. The fact that water is
displaced means nothing...the displaced water is still present, as is the boat, so the boat would still add weight. I don't know how the river is set
up (I just looked at the picture, I didn't really care enough to read anything), but, if it's like a canal, with specific self-contained sections,
then the boats do add weight to the river bridge. If it's just free-flowing water, then the boats don't add weight, but only because the water is
displaced evenly, which means the weight added to the river bridge by the boat is counteracted by the same amount of water leaving the river bridge as
the boat enters it.
It's complicated, really...but boats really do add weight to things. It just all depends on whether or not the water on the river bridge is