Terms in PSAD

Question 1

Causes an abrupt change in shear

Answer 1

Concentrated loads

Question 2

Causes an abrupt change in bending moment

Answer 2

Concentrated Couples

Question 3

Is one that has nothing to do with spatial direction

Answer 3

Scalar Quantity

Question 4

Is one that can be specified completely only if we provide both its magnitude (size) and direction

Answer 4

Vector Quantity

Question 5

Or sum, of a number of vectors of a particular type is that single vector that would have the same effect as all the original vectors taken together

Answer 5

Resultant

Question 6

Zero in length when vectors a and b point in the same, or opposite, direction and reach maximum length when vectors a and b are at right angles.

Answer 6

Cross Product

Question 7

-Actual path covered by a body in any direction
- scalar quantity
-always positive

Answer 7

Distance

Question 8

-Shortest path between the initial and final position of a body
-vector quantity
-can be positive, negative or zero

Answer 8

Displacement

Question 9

Members that support loadings that are applied perpendicular to their longitudinal axis.

Answer 9

Beams

Question 10

What do you call the retarding force acting opposite a body in motion

Answer 10

Kinetic Friction

Question 11

Which structural member has the ratio of its unsupported height to its least lateral dimension of not less than 3 and is used primarily to support axial load

Answer 11

Column

Question 12

What do you call the force which determines whether the body will be in equilibrium or will have a varying state of motion.

Answer 12

Resultant

Question 13

Identify the principle used in equations related to the deformation of axially loaded materials: That the stress is proportional to the strain within the elastic region.

Answer 13

Hooke’s Law

Question 14

Identify the principle used in equations related to the deformation of axially loaded materials: That in the deformation of axially loaded members, the ratio of the lateral to the longitudinal strain is constant.

Answer 14

Poisson’s Ratio

Question 15

Identify the principle used in equations related to the deformation of axially loaded materials: That within the elastic range’ it is constant of proportionality that defines the linear relationship between stress and strain.

Answer 15

Young’s Modulus

Question 16

Which term refers to the force generated by the body at rest.

Answer 16

Static

Question 17

Which term refers to the force generated by the body at motion.

Answer 17

Dynamic

Question 18

What is the term for the value beyond which the stress is no longer proportional to the strain.

Answer 18

Proportional limit

Question 19

Materials which have the same composition at any point are described as

Answer 19

Homogeneous

Question 20

Which property of material enables it to under large permanent strains before failure

Answer 20

Ductility

Question 21

Which material has the same composition at any point?

Answer 21

Homogeneous