Centre of Gravity and Stability
Symmetry
Strengthening Structures
Choosing Structures
Miscellaneous
100
Usually the wider this is the sturdier the structure.
What is the base?
100
An object is this when it can be divided in two by a line that creates two pieces that are mirror images of each other.
What is symmetrical?
100
This shape is strong because it channels the forced caused by a load down its curved supports.
What is an arch?
100
This kind of structure is hollow on the inside.
What is a shell structure?
100
The weight a structure must be able to hold is known as this.
What is mass?
200
These ancient buildings are very stable because of their triangular shape.
What are pyramids?
200
A structure that is symmetrical is often this:
What is stable?
200
This is a frame that takes advantage of triangles by linking many of them together
What is a truss?
200
Solid structures act as great what?
What are supports?
200
The weight of a structure itself is known as this.
What is its dead load.
300
The point in every object around which all of its weight is centred.
What is the object's centre of gravity?
300
Structures are easier to build if they are this.
What is symmetrical?
300
This is a support that resists compression forces.
What is tie?
300
The strength of a solid structure depends on this.
What is its bulk?
300
A telephone pole is an example of this kind of structure.
What is a solid?
400
A low centre of gravity makes a structure more what?
What is stable?
400
Structures that are symmetrical can distribute these more easily.
What are loads?
400
This is a piece of solid material used to reinforce a seam or a joint.
What is a gusset?
400
Generally frame structures are flexible and they handle these two forces well.
What are tension and torsion?
400
This is a full scale version of a final product that is created for safety testing.
What is a prototype?
500
The stability of a structure depends on the materials it's made from and how this is distributed?
What is mass?
500
A structure that has its centre of gravity over the centre of its support base can resist these forces better than a structure that does not.
What are external?
500
Cardboard is a good packaging material because it is this on the inside.
What is corrugated?
500
Shell structures are great for these two things.
What are protection and being used as a container.
500
When choosing materials for a product one must consider the four following things:
What is strength, availability, cost and the environment?
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