Invisible Forces – Mystery 2

Who created the Golden Gate Bridge?

• Nikola Tesla

• Alexander Graham Bell

• Charles Ellis

One problem with long bridges is that it can sag in the middle. How might engineers solve this problem?

• They make the bridge wider.

• They use pillars under the bridge.

• They make the bridge out of heavier material.

If the middle of a bridge is too far down for a support to be directly underneath, what design to engineers often use instead?

• They use trusses.

• They make the bridge wider.

• They use an arch below the bridge.

In a pillar bridge, what force do the pillars place on the road?

• The pillars are pushing up on the bridge.

• The pillars are pulling down on the bridge.

• The pillars are pulling down from the sides of the bridge.

In an arch bridge, what force is being placed on the road of the bridge?

• There is force pushing up on the bridge from the side.

• There is force pushing up on the bridge from directly below.

• There is force pulling on the bridge from the side.

What type of bridge uses a pull force?

• Arch bridge

• Pillar bridge

• Suspension bridge

What type of bridge has bundles of beams or poles?

• Arch bridge

• Truss bridge

• Suspension bridge

How did the Golden Gate Bridge get its name?

• It’s named after the engineer who designed it.

• It’s named after the body of water underneath it.

• It got its name because of its golden color.