This project investigates two forces that make bridges useful to people: normal force and tension. Students first investigate how normal force allows a bridge to support a load.
Why don’t bridges collapse in the middle?
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Concept: Normal force
Normal force is the force that surfaces exert to prevent solid objects from passing through each other.
In other words, normal force is the force objects experience when they touch.
Learn more about normal force in the following Whybricks activities: