Grade 7 Structures And Forces - LA
Footing
A base that is wider than the wall to help it spread wait over a larger area
Deformation
A change in a structure when the force is acting on it
Torsion
A force that acts on a material by twisting it and in opposite directions
Shearing
A force that bends or tears on a material by pushing parts of it in opposite directions
Tension
A force that pulls the material apart
Friction
A force that resists or work against the movement of 2 surfaces rubbing together
Mobile joint
A joint that is designed to allow movement
Rigid joint
A joint that is designed to fix an object into place and allows no movement
Forces
A push or pull or any type of movement on the structure
Frame structure
A structure in which a skeleton of materials supports the weight of other parts
Metal fatigue
A weaking of metal due to stress what can result in small cracks
Mass structure
A whole bunch of the same material piled up on each other
Manufactured structure
An object or structure made by humans
Natural structure
An object or structure not made by humans
Structure
An object with a definite size and shape that serves a purpose or a function
Shell structure
And outer coating on the material ex an egg or a dome
Composite
Combined different materials with different properties for a specific purpose
Live load
Forces that act on the structure but are not part of the structure
Aesthetics
Properties of an object to make it pleasing to the senses
Mass
The amount of matter in a substance
Center of gravity
The point at which all gravitational force of an object may be considered
Load
The weight carried or supported by a structure
Dead load
The weight of the structure upon itself
Compression
When the material is being squished
Internal forces
Forces that act on an object from the inside
External forces
Forces that act on object from the outside
Weight
The pull of gravity on the object
