What are structures?
A structure is something made out of _____ for a particular purpose
parts
Forces are a _____ or ______
push or pull
How many types of structures are there?
4
Forces that act between two parts of a structure
internal forces
The physical appearance of a structure
Form
The force acting on all objects
gravity
A hollow structure with a curved shape
Shell structure
Name the 4 internal forces
compression, tension, torsion, shear
The task or purpose of a structure
function
Type of load caused by the weight of the structure itself
dead load
A network of parts
Frame structure
What are the two types of external forces?
Non-contact and applied
Structures can be human made or found in ________
nature
Type of load supported by a structure
live load
What kind of structure is a garbage can?
shell
Explain the difference between the point of application and the plane of application
point of application - point where external force is applied
plane of application - imaginary flat surface where the object passes through
What is the tallest building/structure in the world?
Burj Dubai
Mass - the amount of matter in an object
Weight - the force of gravity on an object
What kind of structures are in the human body? List an example for each one
Shell (skull)
Frame (skeleton)
Solid (muscles, bones)
If a girl is sitting on a stool
1. Gravity is one external force acting on her
2. What is the other external/applied force keeping her from being pushed into the ground?
the stool