LESSON 3: FORCE SYSTEMS: FORCE VECTORS Flashcards
(23 cards)
What are the types of vectors
scalar quantities
vector quantities
free vector
sliding vector
bound or fixed vector
unit vector
A type of vector that possess only magnitude; examples are time, volume, energy, mass, density, work.
Scalar quantities
A type of vector that possess
both magnitude and direction (direction is understood to include both the angle that the line of action makes with a given reference line and the sense of the vector along the line of action), examples are force, displacement, velocity.
Example of vector quantites
force, displacement, velocity.
Example of scalar quantities
time, volume, energy, mass, density, work.
A type of vector that may be moved anywhere in space provided it maintains the same direction and magnitude.
Free Vector
A type of vector that may be applied at any point along its line of action.
Sliding Vector
A type of vector that must remain at the same point of application.
Bound | Fixed Vector
is a vector one unit in length.
Unit Vector
a system of vectors is the least number of vectors that will replace the given system.
Resultant
the physical science which deals with the effect of forces on objects at rest
Mechanics
part of mechanics which concerns the equilibrium of bodies under action of forces.
Statics
part of mechanics which concerns the motion of bodies under action of forces
Dynamics
a system of connected parts used to support loads (in more general term: “body”).
Structure
General term for structure
Body
The process to determine how a structure responds to specified loads, based on the application of physical laws (engineering mechanics) and mathematics.
Structural Analysis
only associated with magnitude.
Scalar quantities:
possess direction as well as magnitude.
Vector quantities
not confined to a unique point or line in space.
Free vector
has a line of action but not at a unique point of application. The vector can be applied at any point along the line of action.
Sliding vector
has a unique point of application
Fixed vector
Primary objective of structural objective
computation of reactions, internal forces, stresses, and deformations.
Fundamental relations of structural objective
equilibrium, constitutive, and compatibility.
