Engineering
Problem
A piece of construction equipment 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…)
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