PHYSICS

JAMB 2015 - Question 35

Physics 2015 JAMB Past Questions - Question 35: Marching soldiers crossing a suspension bridge are usually advised to break their steps to avoid damaging the bridge owing to

Choose the correct answers from the options given.
Marching soldiers crossing a suspension bridge are usually advised to break their steps to avoid damaging the bridge owing to
A:
B:
C:
D:
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Correct Answer

D

Explanation

the synchronized vibrations caused by their footsteps. When a large number of soldiers march in unison, their footsteps can create a rhythmic force that resonates with the natural frequency of the bridge. This resonance can lead to excessive vibrations, potentially causing damage to the bridge structure.

By breaking their steps, the soldiers disrupt the synchronization of their footsteps, preventing the resonance from building up. This helps to reduce the amplitude of the vibrations and minimize the risk of structural damage to the bridge.

It's worth noting that modern suspension bridges are designed to withstand a certain level of vibrations, including those caused by marching soldiers. However, as a precautionary measure, breaking the steps is often advised to ensure the long-term integrity of the bridge.