Structures: Internal and External Forces

What is a force?

• A push or a pull that causes an object to change its movement or shape.

• A push or twist that causes an object to change its movement or

• Something from Star Wars

• A push that causes an object to change its movement or shape.

Compression is a force that ________

• squeezes material together

• twists materials

• pulls materials

• rips materials

What type of force is torsion?

• Twisting

• Pushing

• Ripping

• Pulling

What type of force is shear?

• Twisting

• Pulling

• Ripping

• Pushing

The size, direction and the location of where the force is applied are all factors that can effect a structure.

• True

• False

Internal forces resist the external forces acting on a structure.

• True

• False

The term "load" refers to _______________.

• an external force on a structure
• a balanced arrangement of mass
• the necessary resistance of a structure
• a realistic design of a structure's forces

The weight of the equipment of a bus ( including all the parts) is called the _____________.

• human factor
• riding mass
• static load

• dynamic load

You see a crane carrying a load of supplies at a construction site. The rope holding the supplies to the crane is experiencing _____________. 

• shear
• tension
• buckle
• torsion

An example of an external force would be...

• Torsion

• Tension

• Wind

• Bending