Why do soldiers march disorderly while crossing a bridge?
A. To prevent resonance on the bridge B. To set the bridge into resonance C. To make the b ridge collapse D. To spread their weight evenly on the bridge
Correct Answer: A
Explanation
Soldiers march disorderly while crossing a bridge to prevent resonance because when soldiers march in orderly manner across a bridge, they generate a rhythmic oscillation of wave on the bridge and at a certain point, would start oscillation to the same rhym as that of the marching steps. This oscillation would reach a maximum peak when the bridge can no longer sustain its own strength and hence collapses. So for this reasons, soldier are ordered to march disorderly while crossing a bridge
