INTRODUCTION Flashcards
WHAT IS ENGINEERING MECHANICS?
is defined as the science which describes and predicts the conditions of rest
or motion of bodies under the action of forces.
2 MAIN DIVISIONS IN MECHANICS OF RIGID BODIES
STATICS AND DYNAMICS
WHAT IS STATICS
considers the effects of forces on a rigid body that is at rest
WHAT IS DYNAMICS
CONSIDERS THE EFFECTS OF FORCES ON A BODY THAT ARE IN MOTION
WHAT IS SCALAR
QUANTITIES THE POSSESS MAGNITUDE ONLY
WHAT IS VECTOR
QUANTITIES THAT POSSES BOTH MAGNITUDE AND DIRECTION
WHAT IS A RIGID BODY
A DEFINITE AMOUNT OF MATTER WHICH ARE FIXED IN POSITIVE RELATIVE TO EACH OTHER
FORCE
MAY DEFINED AS WHICH CHANGES OR TEND TO CHANGE THE STATE OF MOTION OF A BODY
MASS VS WEIGHT
MASS IS THE AMOUNT OF MATTER IN AN OBJECT
WEIGHT IS FORCE EXERTED ON AN OBJECT BY GRAVITY
WHAT IS PRINCIPLE OF TRANSMISSIBILITY
external effect of a force on a body is the
same for all points of application along its line of action; it is independent of the point of application.
The internal effect of a force, however, is definitely dependent on its point of application.
WHAT IS FORCE SYSTEM
ANY ARRANGEMENT WHERE 2 OR MORE FORCES ACT ON A BODY
COPLANAR VS NON COPLANAR
COPLANAR - FORCE SYSTEM LIES IN ONE PLANE
NON- COPLANAR - FORCE SYSTEM LIE IN SPACE
4 CLASSIFICATIONS OF FORCE SYSTEM ACCORDING TO LINE OF ACTION
COLINEAR
CONCURRENT
NON CONCURRENT
PARALLEL
WHAT IS COLINEAR FS
LINES OF ACTION OF FORCES ARE IN THE SAME LINE
WHAT IS CONCURRENT
LINES OF ACTION OF FORCES PASS THROUGH A COMMON POINT
