Definitions
Topics 1&2
Topics 3&4
Topics 5, 6 & 7
Critical thinking
100
what is soldering?
a joining process used to join different types of metals together
100
what is the importance of aesthetics
To make it visually appealing
100
difference between internal and external forces provide an example of each
internal force = inside --> magnetic, tension, etc.
external force = outside --> friction, applied, etc.
100
Whats the strongest shape and why
triangle
because it pushes the weight out to the sides while the middle bottom part experiences tension
100
By altering the way the parts of a structure are put together, you change its ______ .
function
200
What is a dead load and a live load
dead loads are permanent loads which result from the weight of the structure itself or from other permanent attachments, for example, drywall, roof sheathing and weight of the truss.
Live loads are temporary loads; they are applied to the structure on and off over the life of the structure
200
What are the 3 types of structures and give an example of each
frame - Frame of a House, Car, Airplane, Bridge, Human Skeleton.
shell - Igloos, egg, egg cartons, turtle shell, food or pop cans, or even bubbles in foam and cream puffs.
mass structure - Mountains, Coral Reefs, Dam, Sand Castles, Brick Walls
200
472
200
A gyroscope undergoes spin stabilization what does this mean?
a gyroscope an spherical object that spins on an axis and undergoes spin stabilization which is where the faster something spins the more balance it has (ie a bike)
200
Draw a forces diagram of a triangle
300
What is a fulcrum
the point on which a lever rests or is supported and on which it pivots.
300
What must one consider when choosing materials?
cost
environmental impact
appearance
energy efficiency
300
Draw a force diagram of this 
gravity arrow down and friction up
300
Why is a cantilever a strong structure
because is uses or can use both compression and tension forces to support itself
300
Describe why they keystone is important
its for arches and it helps distribute the weight though out the arch similar to how a triangle works
400
definition for both weight and mass and what they are measure in
Weight is a measure of the force of gravity acting on an object. measured in Newtons
The mass of an object is the measure of the amount of matter in it. (g/kg)
400
Name 5 man made and 5 natural structures
answers vary
400
What is the gravitational coefficient on earth with proper units
9.81m/s2
400
What were the 3 examples of alternatives to beams discussed in class and what are there benefits?
Cylindrical columns
Are lighter and/or can be hollow while still being very strong
Wave-like
This can be seen in cardboard, again less material is used and more strength is provided
Animal bones
Hollow and filled with light spongy material
400
You currently have a mass of 53 kg on earth. If you were to fly to mars what would your new weight and mass be if the gravitational force is 3.71 m/s2
mass =53 kg
weight = 196.63 N
500
What is the foundation, what are pilings and what are footings
foundation - the lowest load-bearing part of a building, typically below ground level
pilings - heavy stakes or posts installed to support the foundations
footings - distributes the weight of the building evenly across the entire structure so that it doesn't sink into the ground.
500
What are all 7 ways you have discussed that are ways to hold materials together
Mobile Joints are joints that allow movement
Rigid Joints do not allow movement
Fasteners - Nails, staples, bolts, screws, rivets and dowels. The holes made in the structure, by the fastener, actually weaken the structure. One fastener allows movement when the parts are pushed or pulled, whereas, more than one will make a more rigid joint – but, will also weaken it more.
Interlocking shapes (like Lego) fit together because of their shape. Dovetail joints in drawers, dental fillings and folded seams are some examples.
Ties, like thread, string and rope, fasten things together.
Adhesives or sticky substances can also hold things together.
Melting – Pieces of metal or plastic can be melted together (welding, soldering – brazing or using chemicals)
500
What are 4 types of forces that objects can feel possibly causing them to break
shear - rip
torsion - twist
tension - stretch
compression - squish
500
Designers often rely on key methods to help structures withstand forces
Distribute the load throughout the structure so that no single part is carrying most the load
Direct the forces along angled components so that the forces hold pieces together instead of pulling them apart
Shape the parts to withstand the specific type of force they are likely to experience
500
You are asked to build a room for the school what are three types of supports would be best to be used.
braces - angle for support
cantilevers - A cantilever is a horizontal beam or board, supported by a very strong column at only one end. Beams from the top of a cantilever bridge pull upwards while the ones on the bottom push downwards.
arches - disperse weight throughout structure similar to triangle with the keystone being the most important