Question

Why solider does nt allow to take step up while crossing the bridge?

NO SPARM

Answer 1

If their frequency is closely matched to the bridge's frequency, the soldiers' rhythmic marching will amplify the vibrational frequency of the bridge. If the mechanical resonance is strong enough, the bridge can vibrate until it collapses from the movement.

Answer 2

Hey mate,....

When the soldiers walk in step, they produce some fixed frequency. If this frequency corresponds to the natural frequency of the bridge, resonance can takes place. This will make the bridge vibrate violently, and hence it may collapse. To avoid such a situation, the soldiers are asked not to march in step.

Hope it will help you.

⭐Sai.