Which problem was intensified when Viking longship rope bridges had supporting pillars placed too closely?

💡 Explanation

Resonant frequency amplification risk elevates because shortened spans have higher natural frequencies of vibration. Therefore, bridges become susceptible to external vibrations matching those frequencies and amplify them causing structural damage, rather than withstanding stable oscillations needing wider span.

• Which risk during ocean voyages increased with Medieval longships using plant-based (hemp) rigging?
• Which risk increases when bronze tools or weapons are used in highly saline environments during the Bronze Age?
• Which consequence results when 18th-century shipwrights employed inadequate seasoning?
• For efficient historical bronze casting, which action prevents brittle molds?
• Which outcome occurred when cast iron crossbow triggers experienced repeated stress?
• Which error introduced when a chronometer's mainspring weakens affecting its isochronism?