Structures and force Flashcards
structures
an object with a defined size and shape which serves a purpose or function. the parts of a structure have a specific arrangement that remains the same
function
of a structure or object, its the main purpose
forces
a push or pull, or anything that causes a change in the motion of an object
load
the weight carried or supported by a structure
natural structures
a object or structure not made by people
manufactured structures
an object or structure made by humans
desighn
the shape and size or a structure and the materials of which is it composed
Mass structure
a structure, natural or manufactured that is made by the piling up of material;example of a mass structure include a pyramid and a snow front
frame structure
a type of structure in which a skeleton of material supports the weight of the other parts
shell structure
a type of structure that obtains its strength from a thin carefully shaped outer layer of material and that required no internal frame; example of a shell structure include an igloo and an egg
Aesthetic
A branch of philosophy that studies the principles of beauty;the properties of an object that make it pleasing to the senses
Margin of safety
The need for something built or manufactured to perform as expected for a long time, so that people’s safety and health are not at risk.in a structure s margin of safety would ensure that the structure has extra strength to support more load than normal
Properties
The characteristics of materials; every material has its own unique properties example of properties include colour odour and density
Composite
Of material made up of several different materials with different properties to fulfill a specific purpose
Lamination
A process in which a layer of material is pressed or glued onto other layers
4 consideration for choosing material
Cost
Appearance
Environmental impact
Energy efficiency
Mobile joints
A joint that is designed to allow movement example of a mobile joint include a door hinge and an elbow
Rigid joint
A device designed to fix an object into place a joint that allows no movement example of a ridged joint include nail and a screw
5 categories of ridged joints
Fasteners Interlocking shapes Ties Adhesive Melting (welding and soldering
Aesthetic
A branch of philosophy that studies the principles of beauty;the properties of an object that make it pleasing to the senses
Margin of safety
The need for something built or manufactured to perform as expected for a long time, so that people’s safety and health are not at risk.in a structure s margin of safety would ensure that the structure has extra strength to support more load than normal
Properties
The characteristics of materials; every material has its own unique properties example of properties include colour odour and density
Composite
Of material made up of several different materials with different properties to fulfill a specific purpose
Lamination
A process in which a layer of material is pressed or glued onto other layers
4 consideration for choosing material
Cost
Appearance
Environmental impact
Energy efficiency
Mobile joints
A joint that is designed to allow movement example of a mobile joint include a door hinge and an elbow
Rigid joint
A device designed to fix an object into place a joint that allows no movement example of a ridged joint include nail and a screw
5 categories of ridged joints
Fasteners Interlocking shapes Ties Adhesive Melting (welding and soldering
Mass
The amount of matter a substance; often measured with a balance
Primary Standard
The name given to a small cylinder of metal on which the kilogram(kg) is based; equivalent to 1kg
Kilogram (kg)
The primary measurement of mass In SI, equal to 100g; 1kg is the primary standard for mass
Balance
A device to measure mass; many balances work by using the force of gravity
Forces
A push or pull, or anything that causes a change in the motion of an object
Newton (N)
The standard unit of force in the SI
Force meter
a scientific device used to measure force; also called a spring scale
Gravitational force
The force exerted by gravity on an object; measured in Newtons (N); the preferred scientific term for the everyday term “weight”
Weight
The force of gravity exerted on a mass
Force diagram
A drawing that uses arrows to represent the direction and strength of one or more forces
