Structures
What is a Live Load?
A Live Load is everything added to the structure. A Live Load could be people walking on a bridge or snow falling on a house.
Can a Beam Bridge hold a Live Load?
Yes
A Worm Gear meets at a 90 degree angle.
True
When is it best to use a Pulley?
It is best to use a Pulley to help you lift a heavy load.
What is a Dead Load?
A Dead Load is the load of the structure itself.
What is the Strength of a Structure?
The Strength of a Structure is how much load it can hold.
What type of Bridge is the Golden Gate Bridge?
Suspension Bridge
What type of motion do Rack-and-Pinion Gears create?
Reciprocating (back and forth) motion
If you add a this to a Pulley system, you can move something larger.
A Counterweight.
How long does it take plastic bags to decompose in landfills?
50 to several thousand years.
How can we make Structures more friendly to the environment?
Which type of bridge is known for its fan pattern?
Cable-Stayed Bridges
What is a Gear?
A Gear is a Wheel with Teeth.
What are the three main types of Pulleys?
Fixed Pulley, Movable Pulleys, and Compound Pulleys.
What is an example of a Gear found in the school? What is an example of a Pulley found in the school?
Gear - Clocks
Pulley - flagpole, blinds, basketball nets
Name 2 Natural Structures and 2 Man-Made Structures.
Natural Structures - anything that can be found in nature, not produced by humans.
Man-Made Structures - anything that is produced by humans.
What shape makes this type of bridge able to hold heavy loads?
Arch Bridge
When two or more gears are connected, it's called a Gear Train. True or False?
True
A Movable Pulley moves with the load. True or False?
True.
What makes a Structure Strong and Stable?
Strong Materials that are Reinforced with a Stable Foundation.
What is a Structure?
A Structure is a supporting framework that holds a Load and has a Shape, Size, and a Purpose.
What type of bridge is made out of triangles ( one of the strongest shapes)?
Truss Bridge
How is a Spur Gear different from a Bevel Gear?
Spur Gears are two gears in the same plane, whereas a Bevel Gears are two gears meeting at a 90 degree angle.
What is a Pulley?
A Pulley is a fixed wheel, with a Grooved Rim in which a Rope or Chain runs.
Or, a Pulley is a Simple Machine that has a Wheel on a Fixed Axle.
Key Words: Axle, Wheel, and Rope
What building material creates the most emissions?
Concrete