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Posted: Thu Feb 08, 2007 1:52 am UTC
by chan the evoker
Rereading the original post, I see your confusion. I was speculating about what would happen if a truck was hit by a manhole cover with a kinetic energy equal to that required to lift a 6 metric ton object 5 meters.

I think it's safe to assume that this is not possible, given the effort people go to to reach these velocities.
http://en.wikipedia.org/wiki/Light_gas_gun