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 Subj:.....The Backhoe Vs The Overpass (S498)           From: LABLaughsClean on 8/8/2006 A Backhoe weighing 8 tons is on top of a flatbed trailer and heading east on Interstate 70 near Hays, Kansas. The extended shovel arm is made of hardened refined steel and the approaching overpass is made of commercial- grade concrete, reinforced with 1-1/2 inch steel rebar spaced at 6 inch intervals in a criss-cross pattern layered at 1 foot vertical spacing. Solve: When the shovel arm hits the overpass, how fast do you have to be going to slice the bridge in half? (Assume no effect for headwind and no braking by the driver...) Extra Credit: Solve for the time and distance required for the entire rig to come to a complete stop after hitting the overpass at the speed calculated above.  Added note: Calculate the impact in ft.-lbs. of the truck driver without a seat belt as his head hits the windshield going from 70 mph to 0 mph in 60 ft. Extra, Extra Credit: Calculate, in decibels, the volume of the screams from the Insurance Claim Representative when he realizes that this is HIS customer. . . . . . .