Engineering Question

[grandpawrichard]

ENGINEERING CALCULATION

Problem: A backhoe weighing 8 tons is on top of a flatbed trailer 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 with 1 foot vertical spacing.

Solve: When the shovel arm hits the overpass, how fast does the trailer with the backhoe have to be going to slice the bridge in half? (Assume no headwind and no braking by the driver who is oblivious of the situation . . . )

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 .

Answer: Scroll down ........














Answer - It doesn't really matter... The point is that the trucking company just bought themselves a bridge !


dick

[michihunter]

Better question would be "How long does it take that dumba$$ driver to find a new job!! ;D ;D

[4pointer]

michihunter said:

Better question would be "How long does it take that dumba$$ driver to find a new job!! ;D ;D

L.M.A.O. ;D

[bigskyscott]

4pointer said:

michihunter said:

Better question would be "How long does it take that dumba$$ driver to find a new job!! ;D ;D

L.M.A.O. ;D

I'll bet not until he cleans the drugs out of his system and gets re-tested for a new license,if he's lucky.

[teambateau]

One other question.
What if just at the right moment there was a car in the right spot or approaching that part of the the bridge at the time the arm popped through the driving surface??

[michihunter]

teambateau said:

One other question.
What if just at the right moment there was a car in the right spot or approaching that part of the the bridge at the time the arm popped through the driving surface??