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Static-Force Systems
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This lecture note is mainly quoted from the text books of Statics by Meriam & Karige and Statics by Beer & Johnston
Instructor:
Dr. Ahmet TUKEN
Office: 2A 90
E-mail: atuken@ksu.edu.sa
CHAPTER 2 – FORCE SYSTEMS (INTRODUCTION)
CHAPTER 2 – FORCE SYSTEMS (FORCE & RESULTANT OF TWO FORCES)
CHAPTER 2 – FORCE SYSTEMS (RECTANGULAR COMPONENTS)
• Forces acting on rigid bodies are divided into two groups:
- External forces (i.e. applied forces, reactions & weight)
- Internal forces (tension, compression, shear, bending & torsional moments)
• External forces are shown in a free-body diagram.
CHAPTER 2 – FORCE SYSTEMS (EXTERNAL AND INTERNAL FORCES)
CHAPTER 2 – FORCE SYSTEMS (PRINCIPLE OF TRANSMISSIBILITY - 1)
CHAPTER 2 – FORCE SYSTEMS (PRINCIPLE OF TRANSMISSIBILITY - 2)
CHAPTER 2 – FORCE SYSTEMS (FORCE CLASSIFICATION)
Collinear : If several forces lie along the same line of action, they are said to be collinear.
Coplanar : When all forces acting on a body are in the same plane, the forces are coplanar.
Concurrent : A concurrent force system contains forces whose lines of action meet at a common point.
CHAPTER 2 – FORCE SYSTEMS (Collinear, Coplanar & Concurrent Forces)
ENGINEERING MECHANICS : STATICS CHAPTER 2 – FORCE SYSTEMS
CHAPTER 2 – FORCE SYSTEMS
CHAPTER 2 – FORCE SYSTEMS
P + Q + S = (P + Q) + S = P + (Q + S) This is the Associative Law of Vector Addition
Polygon Rule: can be used for the addition of more than two vectors. Two vectors are actually summed and added to the third and so on...
CHAPTER 2 – FORCE SYSTEMS (VECTOR ADDITION - POLYGON RULE)
CHAPTER 2 – FORCE SYSTEMS
CHAPTER 2 – FORCE SYSTEMS
CHAPTER 2 – FORCE SYSTEMS (RESULTANT OF VECTORS)
EXAMPLE - 1 CHAPTER 2 – FORCE SYSTEMS
EXAMPLE – 1 (CONTINUED) CHAPTER 2 – FORCE SYSTEMS
EXAMPLE - 2 CHAPTER 2 – FORCE SYSTEMS
EXAMPLE – 2 (CONTINUED) CHAPTER 2 – FORCE SYSTEMS
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