Which problem arose in Roman road construction when exceeding grade limits on inclines?

💡 Explanation

Increased grades exceeded tractive effort limits causing wheel slippage through decreased static friction because friction depends on the normal force. Therefore animal haulage was less efficient, rather than increased landslides which require substantial moisture and erosion.

• Which mechanical risk sharply increased aboard Viking longships attempting trans-oceanic journeys?
• Which outcome arose when early silk production involved intensive sericulture?
• Which constraint limits the size composition in pietra dura?
• Which outcome occurs when a wooden-hulled ship grounds on a reef for an extended period?
• Which mechanical effect limited the size of late 19th-century steam turbine blades before the advent of improved metallurgy?
• Which failure sharply raised risk to early explosive cannons?