Why don’t bridges collapse in the middle?
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. They then observe the additional challenges involved with making a longer bridge. Students explore how tension is used with upward support beams in bridges to create a strong bridge. An optional extra challenge allows students to test the concept in practice, substituting in string for the sturdier Whybricks parts and observing the results.