Bridges
What are the two things to consider when deciding what type of bridge to build?
How stable is it and how much weight can it carry
Explain: Shear
Is a force which pushes parts of a structure in opposite directions
How much can a newton hold
100 Grams
Explain: Static loads
Non-moving, non-changing loads, often called dead loads
true or false the pushers will apply force through the bumper and that is Direction of the Force
false
what are the four types of bridges
Explain: Tension
It is a pulling force
How do we measure force
In newtons
Explain: Dynamic loads
Moving or changing loads often called live loads.
true or false the centre of gravity is the center of the object
false
Explain: Suspension Bridge
The bridge deck hangs between two ends (2 massive towers) towers support the bridge deck with massive cables
Explain: Compression
It is a sqeezing force
true or false 2000g 2kg 20n is all the same
True, they are all the same
Example of stactic loads
The dead load on a roof is the shingles
true or false it take one newton of force to hold a apple
true
Explain: Truss Bridge
Lightweight bridge Makes repeated use of triangles
what is internal force
Forces that act within a structure
True or false 3000g 30kg 30n is all the same
False, it is not the same
Examples of dyamic loads
The live load on a roof would be snow, rain, wind
true or false the three internal forces are shear compresion tension
true
Beam Bridge
Flat, supported at both ends, most common Supported by piers/columns
What is a external force
Something pushing on something on the outside of the object
True or false 600 000g 600kg 6000N is the same
True, it is the same
what is the difference between dynamic and static loads
Dynamic loads: they are moving loads
Static loads: they are non moving loads
true or false If two forces act within the same structure you have complimentary forces
true