I thought of Otah when I saw this on the web today.
ENGINEERING QUESTION
Conditions:
A backhoe 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 1 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 halfway?
(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.
I couldn't solve it either.
But, the pictures are great
It is amazing to learn the costs of these huge machines. How on earth do they afford it? On our recent trip, I would see 5-6 of these things parked at one farm, so I guess many rent them?
Rentals, or lease. I don't know if we own ours outright or make payments. We trade up about every two years so that helps. Boss said it costs us about $17k a year to run and keep the combine.
At $504,000 for the machine, it would take 30 years at $17,000 a year to pay it off, and that is not counting in interest. Either it doesn't cost 504K, or your employer is paying a lot more than 17K a year.
Maybe the $17k was just depreciation...yea...that's it...
100 gal a day? That's cute... Our track tractor can use up to 300 gal a day if you work it for 11-12 hours hard. Pulling the disc-ripper it uses 25-28 gallons an hour of diesel.
So i spent pretty much the whole day installing a Gear Vendors overdrive on my truck only to have it not only not work, but take out reverse too... $600 wasted... Guess i'll find another factory driveshaft and go back to stock...