🌉🔧Engineering
How Do Bridges Stay Up?
"Why don't bridges fall down with all those cars on them?"
💡 Simple Explanation
Bridges are like really strong arms holding hands across a gap! Engineers figure out how heavy cars and trucks can be, then build something even stronger. Some bridges use triangles - triangles are super strong shapes that don't squish or wiggle. Other bridges hang from giant cables like a swing hangs from chains. Some use arches that push weight out to the sides instead of straight down. Engineers test everything with math before building!
🎉 Fun Fact!
The Golden Gate Bridge's cables are made of 80,000 miles of wire - enough to wrap around Earth three times!