A Frame that is used to male stable structures, usually used in roofs.
Truss
"For every action (force) in nature there is an equal and opposite ___________"
Reaction
What is a force which acts on a object without touching it?
Non-contact force
What is the type of forces resist external forces that act on it form the outside?
Internal force
What type of force?


torsion
Steal beams can be known as 'I' beams or _____ beams
'H'
What is A?

Reaction Force
What is a force that acts on an object by touching it?
Contact force
What is this type of force?

Tension
Changing the shape of a paper clip is an example of __________
Plasticity
Part of the truss that is under compression
Strut
What is B?

An Action Force
_______________ are forces that are a result of the environment pushing or pulling.
External Forces
Using a see-saw produces a __________ forces
bending
The force made by a compressed or stretched spring upon any object that is attached to it.
Spring force
Part of the Truss which is under tension
Tie
What is A?

Raction Force
Electrical, gravitational and _________ are non-contact forces.
Magnetic
When you sit on something this type of internal force is produced on the chair?
Compression
A sponge being compression and than returning to its' shape is a great example of ____________.
Elasticity
Below the bridge is under ____________.
Compression
What is B?

Action Force
Normal force, frictional force, Drag force, applied force, and __________ are types of contact forces we have cover this unit.
Spring Force
The scissors in the picture are producing ________ force
Shear
What is the action force in this experiment?

Pulling the spoon back