CJ 421 Lecture 5: CJ 421 Notes 01-27-2017

• School: University of Alabama
• Department: Criminal Justice
• Course: CJ 421
• Professor: Matt Dolliver

Document Summary

And it all came tumbling down: structural failures. Physical and other evidence used to make a determination. Torque, torsion, stress, and strength center but farther away from each other near the ends. Torsion - twisting something; horizontal lines get closer together at the. Torque - rotational energy; you can apply straight line force and get. These are the key points to understanding a suspension bridge torque. The scientists accounted for a margin of safety - so they accounted for 20% more than the expected load and all extra precautions. Tried using iron in a suspension bridge for the first time. Everything vibrates at a subatomic level and everything has a unique frequency that determines how it vibrates. Galloping gertie made out this particular metal with a particular frequency and the wind was producing a perfect harmonic resonance for the bridge.