Forces
A force is defined as...
A push and a pull of an object that tends to change it's movement and shape
External forces are forces that...
Internal Forces
Name 2 natural phenomena's that can affect people and structures.
What is flooding, ice storm (blizzard), tornado, hurricane, earthquake, tsunami, volcanos, cold front, and heat waves.
The actual effect of the force on a structure depends on 3things...
What is magnitude (power), direction of the force, and location.
Which of the following is not an example of an external force
weather, car, trucks, compression, or gravity
Compression is defined as...
All structures (buildings, bridges) must go through what before it can be used.
What is rigorous testing.
There are 2 main forces that act on a structure, name these.
What is internal and external.
This 'external' force tests a bridge's stability.
What are automobiles. What is weather.
What is compression, tension, torsion, shear.
An earthquake happens when...
What is movement of tectonic plates: pressure builds and the plates slip.
Engineers have to consider a lot of things before they can build a structure. If the structure (bridge) is designed properly, it should be able to support...
What is true.
Shear is defined as
The push or pull of an object in opposite directions.
Name two impacts of a tornado on the natural environment - farm land - animals.
What is loss of habitat (animals) and fields destroyed, crops lost (food production).
Static and Dynamic loads... which of the two loads are defined as a moving load (cars).
What is a dynamic load.
What happens to structures (buildings, bridges, cities) when an earthquake happens. List 3 things.
What is damage, loss of life, power outages, economic costs (money to rebuild), food and water shortages.
Torsion is defined as
When material is being twisted.
What are engineers doing in Japan to make buildings safer during an earthquake?
What is 'shocks' or dampers to allow the building to sway when the ground shakes.