structures and forces

A firm foundation is necessary to support a structure. Solid ground is not always firm and stable. There are environmental and man-made conditions which make the soil loosen and become compact, which makes the soil relatively unstable. Three strategies are use to ensure a structure is built on a firm foundation. The three strategies include all of the following, EXCEPT ...

Remember when you put your hands on your desk and put all your weight on them - then tried to move them forward? This demonstration was used to identify that your hand (much like a structure) resists movement forward because of ...

The following are examples of natural mass structures ...

The following is an example of a composite material

When a solid material is compressed, small microscopic cracks in the material can enlarge or break apart. This can cause one section of the material to break away from the other part. This action is called ...

When a structure is built to withstand loads - more than it normally would carry - the structure is built with a larger ...

Mobile joints are used to secure materials together in a structure. All of the following joints are examples of mobile joints (allowing movement in a structure) EXCEPT ...

Egg cartons, food cans, bottles and pipes are examples of ...

One important criteria of design - that is usually not written down in the specifications - is that the structure ...

Containing, sheltering, transporting, lifting ... are all words to describe a structure's

When choosing the most suitable materials to build a structure, architects, engineers and designers should consider all of the following before making their final choice ...

'Running bond' is a pattern used for strength in ...

How a structure is put together, how it is shaped and the types of materials that are used to build it are all part of the structure's ...

Sometimes if a new invention comes along, it is based on a scientific principle. Again that is the case with the 'Segway. The one person motorized vehicle, that was recently unveiled, uses the principle - to gain stability of a forward moving object, you need to increase its speed. This new invention utilizes this principle with one of its components, a ...

Cross-country skis are designed to bend when a force is applied. Bending allows the middle of the ski to contact
more snow, giving the skier a better grip when pushing off.
The bending forces that are applied to the ‘camber’ (middle part of the ski) are ...

All of the following structures can be classified as manufactured, EXCEPT

Science fiction often gives us exciting ideas about materials that can withstand almost any force. In reality, the perfect material has not been discovered yet. One material (if it could be made the thickness of a pencil - could stop a 747 jet). It is currently being synthetically developed and will have widespread use because of its strength. The material is known as ...

Structures fail for a number of reasons. Engineers study failed structures so they can design stronger, more durable structures. A flagpole that has been blown over in a strong wind happens because of the increased force that is applied to the base of the structure making it act like a ...

Bending or tearing a certain material, by pressing on different parts, in opposite directions, at the same time. The force you are creating is called ...

The mass of a container of shampoo is 256 g. Its weight would be ...