How Do Bridges Hold Up Heavy Traffic?

Bridges are like strong, flexible beams that share the weight of cars and trucks. Imagine a bridge as a big ladder, when you step on it, it bends just a little but doesn’t break. When cars drive over it, they push down, and the bridge pushes back up, keeping everything balanced.

How It Works

Bridges use materials like concrete and steel, which are really strong. Some bridges even have supports underneath to help them hold more weight. These supports act like helpers that take some of the pressure off the main beam.

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Examples

A wooden plank across a stream holds up your weight by bending slightly, just like a bridge holds up cars.
If you stack too many books on a table, it might break, bridges work the same way but are much stronger.
Cables in a suspension bridge act like ropes holding up a tent, keeping the deck from falling.

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