Forces
Loads
Materials
Shapes
Geometry
100
Squeezing force is called _______________ while stretching force is called _______________.
Squeezing force is called compression while stretching force is called tension.
100
What are loads?
Forces that act on structures are called loads.
100
True or False: Wood is cheap and light, moderately strong in compression and tension.
True.
100
List the strength of triangle, rectangle, arc shape from weakest to strongest.
Rectangle is the weakest, followed by arc, then triangle.
100
What are complementary angles and supplementary angles?
Complementary angles are TWO angles that adds up to 90. Supplementary angles are TWO angles that add up to 180.
200
What is torsion?
Torsion is action that twists a material.
200
Dynamic load causes vibrations that can become dangerous over time. What can you do to secure the structure?
Add thick beam so that the structure won't bend or vibrate.
200
True or False: Brick is strong in compression but much weaker in tension.
True.
200
What happens to the rectangle when you push it from the side? a) the rectangle collapses b) the rectangle twists c) the rectangle flops into a slanted parallelogram d) the rectangle remains unaffected
c) the rectangle flops into a slanted parallelogram
200
What is area?
Area is how many numbers of square units (1x1) fills up the space.
300
Shear is a force that causes part of a material to slide past one another in _____________. a) same direction b) opposite direction c) random direction d) circular direction
b) opposite direction
300
How do you reinforce the structure against wind load?
Cross bracing usually made of steel will stabilize the structure from wind.
300
Steel is one of strongest materials used in construction, strong in compression and tension. However, it is weak against....
Rusts, loses strength in extremely high temperatures.
300
What is the easiest way to reinforce a rectangle?
Put a diagonal brace (creating two triangles)
300
Why is line of symmetry important when building a bridge?
Multiple answers, correct answer determined by a teacher.
400
On a separate paper, draw a bent rectangle with the force arrows involved in the rectangle.
top of rectangle stretches like this<--- ---> while the bottom squeezes like this ----><----
400
Describe the difference between dead load vs live load.
Dead load is weight of the structure itself permanently attached to the structure (like pillar, columns, beams, etc.) Live load is the weight of stuff on the structure (like car, people, elephants in our virtual lab, etc.)
400
This materials is fireproof and weather proof. You can also mold to any shape.
Concrete, or reinforced concrete
400
How do engineers reinforce arch?
Arch can be reinforced with buttresses to push back the sides of the arch from spreading apart.
400
What is translation, rotation, and reflection?
Translation is when you slide an object. Rotation is when you spin the object in a clockwise or counterclockwise. Reflection is a mirror image (when you fold it in half, it'll match).
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