Structures and Forces

Three types of basic bridges are:

• Beam, Arch and Suspension
• Golden Gate, Hudson and Chattahoochie
• Brooklyn, London and Ambassador 
• George Washington, Mackinac and Seven Mile

A force that stretches or strains.

• compression

• friction

• gravity

• tension

Which type of bridge uses cables or ropes to hold it up?

• suspension

• arch

• beam

Which type of bridge is held up by pillars or columns?

• suspension

• arch

• beam

Center of gravity is usually located where

• more weight is concentrated

• less weight is concentrated

• less mass is concentrated

• more mass is concentrated

Tags

NGSS.MS-PS2-4

What is one way you might increase the stability of an object?

• Lower the center of gravity

• Raise the center of gravity

• Increase the height of the object

• Shorten the base of the object

Which is the best explanation of the term "weight"?

• A large celestial body that revolves around a star.

• Measurement of the force of Earth's gravity pulling you down.

• A push or a pull.

• Attraction between two objects that is proportional to the masses of the objects.

Tags

NGSS.MS-PS2-4

Any object with mass has gravity.

• True
• Sometimes
• False
• Never

Tags

NGSS.MS-PS2-4

An object that provides support is called ________.

• a structure
• a design
• the base
• supportive

The strongest structural shape is _________.

• rectangular
• arched
• square
• triangular