The Tacoma Narrows Bridge and the Lessons Learned

What are the two hypotheses of why the Tacoma Narrows Bridge failed?

• wind-induced and stress-induced

• resonance and aerodynamic instability

• Galloping Gertie and Nagging Nerdie

Why did the bridge start twisting?

• A cable slipped.

• It was too windy.

• The suspension bridge was too fragile.

The best explanation of "torsional flutter" in this case is ___.

• some kind of twisting motion

• self-induced twisting motion

• I dot car.

Today, most engineers believe that the bridge failed because of ___.

• Resonance

• Aerodynamic instability

• Wind-tunnel testing

Do I love Grace's English class?

• Definitely!

• I'm not sure...

• Grace?

  Who is she??