PAE: Structure Design-Static Forces Quiz

What are static forces?

• Forces that cause motion

• Forces that act on objects at rest

• Forces that increase speed

• Forces that decrease weight

What are the two major types of static forces?

• Friction and gravity

• Compression and tension

• Motion and rest

• Weight and mass

What is an example of a compression force?

• A rope pulling a bucket

• A chair leg supporting a person

• A spring stretching

• A car accelerating

What happens to an elastic rope under tension forces?

• It breaks immediately

• It stretches until internal forces overcome external forces

• It remains unchanged

• It shortens

For structures to remain intact, the internal forces of the structure must be ​ (a)   to withstand the ​ (b)   forces acting on the structure

• external
• strong enough
• flexible enough
• internal
• cold
• large enough

What happens to a rigid rope under tension forces?

• It stretches

• It changes color

• It remains the same length

• It melts

Why is it important to distribute forces in a structure?

• Because structures look prettier when they are well balanced.

• So the forces do not become concentrated on a single support.

• So that you increase the weight of the structure.

• So the structure does not get too tall.

What is the effect of compression forces on a spring?

• It stretches

• It changes shape

• It remains unchanged

• It breaks

What is the result of a force acting on a rope holding a hanging plant?

• The rope shortens

• The rope stretches

• The rope remains unchanged

• The rope breaks immediately

What happens to the legs of a chair made of a rigid material under compression?

• They stretch

• They remain unchanged

• They break immediately

• They melt