Forces Acting on Structures & Mechanisms

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.

What are complex machines?

• Machines that are really difficult to understand.

• Two or more simple machines working in unison.

• One machine that does many different things.

What is a static load?

• A load that causes static electricity

• A moving load

• A non-moving load

What is a dynamic load?

• A moving load

• A non-moving load

• A load that is always changing

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

What is the purpose of simple machines?

• To make it harder to move a load.

• To make easier work more difficult.

• To make it easier to move a load.

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

• True

• False

Tension is a twisting force?

• True

• False