Structures and Forces - Topics 4 - 7

The strongest structural shape is _________.

• rectangular
• arched
• square
• triangular

Your friend steals your paper and pretends to rip it but does not apply enough force to successfully do so. The paper as exhibited ___________.

• tensile strength

• compressive strength

• shear strength

• torsion strength

The amount of matter in an object is referred to as its _____________.

• grams
• weight
• force
• mass

The weight of the equipment of a bus ( including all the parts) is called the _____________.

• human factor
• riding mass
• dead load
• live load

An internal force is one where ____________.

• one part of a structure exerts force on another part of the same structure.

• one part of a structure absorbs force form outside the structure

• the inside of the structure combines with the overall force of the structure

• the external forces exert pressure on the internal supports of the structure

Three internal forces that are classified by the direction in which they act are ____________.

• compression, tension, and exertion
• tension, compression, and shear
• shear, exertion, and stress
• curvature, twisting, and bending

You see a crane carrying a load of supplies at a construction site. The rope holding the supplies to the crane is experiencing _____________. 

• shear
• tension
• buckle
• torsion

A Christmas ornament hangs on the tree with a piece of string.  To prevent the string from snapping, it must have __________.

• tensile strength
• compression strength
• shear strength
• torsion strength

Under which soil conditions would the use of pilings not be needed?  

• sand
• gravel
• bedrock
• waterlogged soil

Why are you more likely to fall over if you stand with only one foot on the ground rather than with two feet on the ground?

• a. With only one foot on the ground, your alignment is off 
• b. With only one foot on the ground, your leg lacks tensile strength 
• c. With two feet on the ground, your mass is distributed over more area 
• d. With two feet on the ground, your center of gravity is closer to the ground