structure 101

Match each picture with its appropriate force.

• Torsion

• 
• Tension

• 
• Compression

• 
• Shear

• 

What is an example of a tension force in your everyday life?

• Stretching a rubber band

• Twisting a towel

• Squeezing a balloon

• Cutting a sheet of paper

Erasing a mistake with a pencil eraser is an example of a ​​ (a)   force. Cutting and ​ (b)   produce this kind of force. Tools like knives or ​ (c)   use this force to do their job. Other examples include ​ (d)   bread or cutting ​ (e)   .

• shear
• sliding
• scissors
• slicing
• vegetables
• tension
• stretching
• rubber bands
• squeezing

Dead loads on a bridge include beams, cables, and ​ (a)   . Live loads would include cars or ​ (b)   .

• bricks
• people
• shadows
• clouds
• names

Payload refers to the part of a vehicle's load that generates revenue (money). What are two examples of payload on an aircraft?

• The passengers

• The seats

• The luggage

• The engines

Which bridge will most likely be stronger? Why?