Math/Engineer people: help with a problem.

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 ½ inch steel rebar spaced at 6-inch intervals in a crisscross 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.

http://forum.gorillamask.net/showthread.php?t=28759

nt

when you slice it in half does it topple or sit perfectly on top of itself

:wow:

As the backhoe was being loaded onto the trailer?

All my dynamics problems from physics had them.

It makes a difference

*crumples up paper*

:eyes:

Or maybe steam powered?

:eyes:

One way, it's up; the other, down.

is this was NOT one of my company's projects...

...For a change :hide:

Anybody else get that? What did you all get?