Forces
External Force
Forces Acting on Structures
Internal Forces
Strength in Shapes
100
A push or pull that tends to cause an object to change its movement or shape
What is a force
100
All structures on earth must be able to resist this force pulling on them
What is the force of gravity
100
Is an external force, has two types
What is load
100
Forces that act within a structure
What is an internal structure
100
A strong rigid shape that cannot be bent
What is a triangle
200
3 things that affect the force of a structure
What is magnitude, direction, and location
200
A force that is applied on a structure by something else
What is an external force
200
The weight of the structure and the non-moving load it supports, also known as dead load
What is static load
200
A force that acts to stretch or pull apart something
What is Tension
200
Results when internal and external forces are applied to a structure which can weaken it
What is structural stress
300
The standard unit for measuring force
What is a Newton
300
The amount of matter in an object
What is mass
300
An external force that moves or changes with time, also known as live load
What is dynamic load
300
A force that acts on an object or pushes parts together within an object
What is compression
300
Is a framework of beams joined together. Usually, in the form of interlocking triangles
What is a truss
400
1 newton is needed to hold up a mass of
What is 100 grams
400
The imaginary point in an object where the downward force of gravity acts
What is centre of gravity
400
This type of bridge is
What is a truss bridge
400
A force which push parts which are in contact with each other in opposite directions
What is shear
400
A strong structure that can stand by itself
What is columns
500
This device weighs newtons and grams
What is a spring scale
500
A balanced arrangement of mass that occurs on opposite sides of a line or plane, or around a centre of axis
What is symmetry
500
This type of bridge is
What is a beam bridge
500
When different kinds of internal forces act on a structure at the same time
What is complementary forces
500
Results when a structure can no longer stand up to the forces acting on it
What is structural failure