Monday, March 9, 2009

Building A Suspension Bridge

This was such a neat activity -- the kids learned the science behind suspension bridges -- and then tried their hand at making one of their own! First, they built the supports from PVC piping, then used heavy-duty twine to create the suspension cords that are anchored to the ground.

After recruiting some of the kids to hold these anchors (this is what Hayley is doing in the above picture!), the other kids started looping string around the wooden plank and the twine suspension cord....and guess what? It worked!

We are surrounded by bridges in Minnesota thanks to our many lakes and rivers, but none are suspension bridges. This is because suspension bridges are used to span long distances across relatively deep water....not something we have here. Still, it was very interesting to learn the engineering behind these beautiful, magnificent bridges.

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