ES1_Fundamental Concepts and Definitions, Force, and Force Systems Flashcards
An applied science which describes and predicts the conditions of rest or motion of bodies under the action of forces.
Mechanics
What are the categories of Mechanics?
Rigid Bodies, Deformable Bodies, Fluids
A physical quantity depicting the geometric measurement of 2 points.
Length
the standard unit of length
Distance
Associated with the notion of the position of a point, P, given in terms of three coordinates measured from a reference point or origin.
Space
Essential for defining an event, requiring specification of the time and position at which it occurred.
Time
Amount of matter an object contains, used for characterizing and comparing bodies.
Mass
Represents the action of one body on another, characterized by its point of application, magnitude, and direction.
Force
Used for measuring different physical quantities.
Systems of Units
Force that is generated outside the body, such as a load on the body.
External force
Force that is generated inside the body to keep it together.
Internal force
An external force that tries to change the state of movement of the body. Example is the weight of a person.
Applied force
A force that inhibits change in the state of movement of a body when acted on by an applied force.
Reaction force
Force density, measured in N/m.
Distributed force
A sketch showing only the forces on the selected particle.
Free-Body Diagram
It shows the physical conditions of the problem.
Space Diagram
A sketch showing only the forces on the selected particle.
Free-Body Diagram
SI unit for for force
Newton
(kg*m/s^2)
Newton
US Customary unit for Mass
Slug
US Customary unit for Force
Pound
(lb/s^2)/ ft
Slug
1 ft=___m
0.3048 m
1 slug =__ kg
14.5938 kg
1 lb = ___ N
4.4482 N
Prefix and SI Symbol for 10^9
Giga (G)
Prefix and SI Symbol for 10^6
Mega (M)
Prefix for 10^-6
Micro
Prefix and SI Symbol for 10^-9
nano (n)
9.81 m/s^2 = ___ ft/s^2
32.2 ft/s^2
Forces whose lines of action pass through
a common point
Concurrent
Forces whose lines of actions are parallel
Parallel
Forces whose lines of actions are neither parallel nor intersect in a common point
Non-concurrent
If the resultant force on a particle is zero, the particle will remain at rest or continue to move in a straight line.
Newton’s First Law
A particle will have an acceleration proportional to a non-zero resultant applied force.
Newton’s Second Law
The forces of action and reaction between two particles have the same magnitude and line of action with opposite sense
Newton’s Third Law
It states that the external effect of a force on a body is the same for all points of application along its line of action.
Principle of transmissibility of a force
