This preview shows pages 1–2. Sign up to view the full content.
ME 214 Vector Statics
Week 2
Lecture 5, Chapter 2
Instructor: A Rezaei
Today’s Objective: Students will be able to:
a) Draw a free body diagram (FBD), and,
b) Apply equations of equilibrium to solve a 2D problem.
Important Note: Free Body Diagram is one of the most important topics in
understanding the basic
concepts
in STATICS, do yourself a favor
and LEARN
HOW TO DRAW
FBD
(Free Body Diagrams) correctly
.
If you do not draw
the FBD correctly, there is no way you will be doing a STATICS
problem
correctly.
THE WHAT, WHY AND HOW OF A FREE BODY DIAGRAM (FBD)
What
? 
It is a drawing that shows all external forces acting on the particle.
Why
? 
It helps you write the equations of equilibrium used to solve for the unknowns (usually forces or angles).
How
?
1.
Imagine the particle to be isolated or cut free from its surroundings.
2.
Show all the forces that act on the particle.
Active forces: They want to move the particle.
Reactive forces: They tend to resist the motion.
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
This is the end of the preview. Sign up
to
access the rest of the document.
This note was uploaded on 10/04/2010 for the course ME 214 taught by Professor Lipovetsky during the Summer '06 term at Cal Poly Pomona.
 Summer '06
 Lipovetsky
 Statics

Click to edit the document details