Forces
What is a force?
A force is a push or a pull. A force can make an object start moving or stop moving.
What is an internal force?
An internal force is a force that acts from within the structure.
What type of bridge is this...bridges have a semicircular shape to provide support?
Arch
What is magnitude?
Is the size of the force.
What protects a turtle, snail, porcupine, and a jellyfish from predators?
Turtle & Snail- shell
Porcupine- quills
Jellyfish- tentacles
What are the 4 internal forces?
tension, torsion, shear, and compression
What is compression?
is a force that squeezes or presses something together.
What type of bridge is this... bridges are held up by ropes attached to tall structures?
Suspension
What is a direction?
The course along which a force is moving.
List 3 examples of protective equipment.
I.E. goggles, steel-toed boots, harness, hard hat, seatbelt, shoulder pads, helmet, elbow pads, mouth guard etc.
What are 3 examples of external forces?
A gust of wind
Gravity
Rain
What is tension?
is a stretching force that expands or lengthens.
What type of bridge is this... bridges have an assembly of triangles for extra support?
Truss
What is the point of application?
The exact location at which a force is applied to a body.
What is an earthquake?
Earthquakes occur when the earth’s surface shakes, rolls, or has a sudden shock.
What is the difference between an internal and external force?
Internal forces are forces that occur within a structure. External forces are caused by external agents in a structure.
What is shear?
is a force that pushes in opposite directions.
What type of bridge is this... bridges are the simplest type of bridges. They have a horizontal beam and a deck?
Beam
What is a contact force?
Force created when two objects touch.
What is an avalanches?
An avalanche is a large amount of snow that quickly moves down the slope of a hill or mountain.
What is the difference between a static and dynamic load?
Dynamic loads are subject to change. Static loads stay the same.
What is torsion?
is a force in a twisting motion.
What are contact (4) and non-contact (1) forces on bridge?
Contact: Cars, Pedestrians, Wind, Rain
Non-contact: Gravity
What is a non-contact force?
Force created without touching another object.
What is a hurricane?
A hurricane is a huge storm of wind, rain, thunder, and lightning.