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Engineering Math?
(My Quest for the Truth of Life, by Kerminator!)
We all get an opportunity to see how thing work or the result...
Date: 4/29/2010 10:44:11 AM ( 14 y ago)
Enjoy this math problem I did!
Engineering Math Question
Conditions:
A trackhoe weighing 22 tons is on top of a lowboy 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 1½ 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.
Yes, you can neglect friction.
( Sorry the pics did not transfer... maybe next time! ) I\They showed a bridge almost cut in half by the raiased arm of the Back Hoe tractor!
I couldn't solve it either......but who cares. The pictures are great!
The driver was on his cell phone.
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URL: http://www.curezone.org/blogs/fm.asp?i=1614309