how does a bridge work? a mini lesson: bridges & forces

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How does a bridge work? A Mini Lesson: Bridges & Forces

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Page 1: How does a bridge work? A Mini Lesson: Bridges & Forces

How does a bridge work?

A Mini Lesson: Bridges & Forces

Page 2: How does a bridge work? A Mini Lesson: Bridges & Forces

How does a bridge work?– Let’s see what happens when a car

drives across!

A Mini Lesson: Bridges & Forces

Page 3: How does a bridge work? A Mini Lesson: Bridges & Forces

How does a bridge work?– Let’s see what happens when a car

drives across!

A Mini Lesson: Bridges & Forces

Page 4: How does a bridge work? A Mini Lesson: Bridges & Forces

How does a bridge work?– Let’s see what happens when a car

drives across!– What about a more complicated bridge?

A Mini Lesson: Bridges & Forces

Page 5: How does a bridge work? A Mini Lesson: Bridges & Forces

Loads and Forces

A Mini Lesson: Bridges & Forces

Page 6: How does a bridge work? A Mini Lesson: Bridges & Forces

Activity: Build a Suspension Bridge

Task– Build a suspension bridge

• Index cards, string, tape

– Test your design-load the bridge to failure

• 20 minutes• How much weight will yours

be able to hold?!

Page 7: How does a bridge work? A Mini Lesson: Bridges & Forces
Page 8: How does a bridge work? A Mini Lesson: Bridges & Forces

Galloping Gertie

Page 9: How does a bridge work? A Mini Lesson: Bridges & Forces

Activity Recap

• What makes a good bridge?• What are some OTHER loads that could

impact a bridge??

WindEarthquake Snow and Ice