Structures: Internal and External Forces

The strongest structural shape is _________.

• rectangular
• arched
• square
• triangular

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

Gravity is a force that is caused by the Earth pulling objects towards its centre?

• True

• False

Tension is a twisting force?

• True

• False

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

• True

• False

External forces such as extreme weather pose a constant threat to the structural reliability of structures.

• True

• False

How does a structure maintain structural reliability?

• When the internal forces of a structure are greater than the external force

• When the external forces of a structure are greater than the internal force

• When the structure is there for you when you need it most.