+100
How marching crowds collapse bridges
Discover the surprising physics of resonance and find out why marching in step can bring down massive steel and stone bridges.
4 chapters76 assets
by artiteacher · Aug 8, 2026
Earn 100 gems when you complete this project
Top 3
Be the first to earn points here
Chapter 1
The physics of resonance
1What is natural frequency
2The power of resonance
3How marching syncs the steps
4The danger of constructive interference
Open chapter
Chapter 2
Tragedies of synchronized steps
1The Broughton suspension bridge collapse
2The Angers bridge disaster
3The origin of breaking step
4The Albert Bridge warning
Open chapter
Chapter 3
The wobbly Millennium Bridge
1Opening day of the Millennium Bridge
2The mystery of lateral excitation
3Human feedback loops
4The sway in Tokyo
Open chapter
Chapter 4
Engineering safer bridges
1What is damping
2Tuned mass dampers
3Viscous dampers
4Designing for the future
Open chapter