Bridge Design and Shake Test Concepts

The video tutorial demonstrates a bridge design challenge where a team must meet specific constraints, including span, height, and weight support. Initial tests reveal structural weaknesses, prompting redesigns using marshmallows and buttresses for stability. Through iterative testing and modifications, the team successfully strengthens the bridge to withstand a simulated earthquake test, ultimately exceeding the challenge requirements.

What was the required minimum span length for the bridge in the design challenge?

• 45 centimeters

• 30 centimeters

• 35 centimeters

• 40 centimeters

During the initial shake test, what was the main issue that caused the bridge to fail?

• The bridge was too heavy

• The bridge was not tall enough

• The bridge could not hold the weight

• The bridge was too short

What was the purpose of using painters tape during the shake test?

• To secure the bridge to the table

• To ensure consistent shaking distance

• To measure the height of the bridge

• To mark the start and end of the bridge

What was the average length of an earthquake in California, as mentioned in the video?

• 10 seconds

• 15 seconds

• 20 seconds

• 25 seconds

What material was added to the bottom of the bridge's straws to absorb energy during the redesign?

• Rubber bands

• Jumbo marshmallows

• Foam

• Clay

What was the main reason for redesigning the bridge after the initial test?

• To change the material

• To increase the height

• To improve stability

• To reduce weight

What additional feature was added to the bridge to prevent it from falling over during the shake test?

• Longer straws

• Wider base

• Side bracing

• Extra weight

How long did the bridge need to withstand the shake test to meet the challenge requirements?

• 25 seconds

• 20 seconds

• 15 seconds

• 10 seconds

What was the final weight the bridge successfully held during the last test?

• 250 grams

• 500 grams

• 375 grams

• 125 grams

What was the role of the buttresses added to the bridge?

• To increase the height

• To reduce weight

• To provide lateral support

• To absorb water