Loads
What is a static load?
A type of load that does not change in size or position?
What is an external force?
A force that acts on the outside of a structure.
What kind of bridge has a horizontal beam and deck?
A beam bridge
Snow on a mountain that suddenly slides down becomes this.
Give an example of protective gear?
Goggles, safety boots, hard hat
What is a dynamic load?
Something that changes while acting on a structure, such as wind or snow.
What is an internal force?
A force that acts from within the structure, such as shear or torsion.
What kind of bridge has an assembly of triangles for extra support.
A truss bridge
What is an earthquake caused by?
Plates rubbing together under the Earth's surface.
True or false: Seatbelts are examples of protective gear.
True.
A person standing still on a bridge is this type of load.
A static load.
What is a non-contact force?
a force that acts on an object without touching it.
What bridge has a semi-circular shape?
An arch bridge
What is a hurricane?
A massive storm.
What is the point of application?
The point where a force makes contact with an object.
A person jumping on a trampoline creates one of these loads because their force changes with movement.
A dynamic load.
A force that requires two things to touch.
What kind of bridge is held up by cables attached to tall towers.
A suspension bridge?
To be protected from some of the impact of an earthquake.
Why are hard hats important?
To protect the brain from impact forces
A push on a swing is what type of load
A dynamic load.
What is magnitude?
The intensity of a force.
What are forces that act on bridges?
Does melting snow cause avalanches?
Yes.
Give an example of protective equipment used in a winter sport and explain the force it protects against.