Unit D: Structures and Forces

Review Package

Multiple Choice

Which structure is the strongest?

a) Solid structureb) Shell structurec) Frame structured) Flexed structure

An example of a solid structure is:

a) Applesb) Snowshoesc) Bonesd) Snail shell

Which of the following man-made objects was created to mirror duck feet?

a) Snow shoesb) Plane wingsc) Flippersd) Swim goggles

Aesthetics is the ____________ appearance that object has based on its design

a) Uglyb) Pleasing c) Colourd) Mediocre

The unit of measurement that is used to measure force is known as a:

a) Scaleb) Newtonc) Celsiusd) Kilo

The size of a force that is put onto a structure is known as the;

a) Directionb) Locationc) Scaled) Magnitude

The center of gravity is the;

a) Imaginary point on a structure where the downward force of gravity actsb) The middle point of the structurec) The strongest part of a structured) A point on a structure where the base is created

If you are balancing a ruler on your finger and you move it 1CM to the left what will happen

a) Nothingb) The ruler will wobble and go back to perfect balancec) Shift and balance at a slight angled) Fall off

A balanced arrangement of mass that occurs on opposite sides of a line or axis is known as;

a) The center of gravityb) Balancec) Equalityd) Symmetry

A non-moving load and the structure that holds it is known as;

a) A static loadb) A dynamic loadc) A forceful loadd) A angled load

A Dynamic load is represented by;

a) The beams on a bridgeb) Your cell phone in your pocketc) A dog laying on your lapd) Kids running up and down stairs

When different kinds of forces act on one structure they are called

a) Complementary forcesb) Connected forcesc) Compression forcesd) Linked forces

Short Answer

What is the difference between a solid structure, frame structure, and shell structure?

Using houses as an example, explain why houses have a variety of different roofs since they all do the same thing.

With your knowledge of center of gravity explain what happens when the center of gravity of a building or any other structure is too much to one side.

What is the difference between internal and external forces?

What effects do magnitude, direction and location have on a structure? Be sure to explain each.

What is the difference between compression, tension, and shear forces?

Matching

Truss Bridge

Arch Bridge

Suspension Bridge

Beam Bridge