Lecture Notes for Sections 3.1-3.3
1
EQUILIBRIUM OF A PARTICLE IN 3-D
Today’s Objectives
:
Students will be able to :
a) Draw a free body diagram (FBD), and,
b) Apply equations of equilibrium to solve
a 3-D problem.
In-Class Activities
:
•
Reading quiz
•
Applications
•
FBD in 3-D
•
Set each force in
Cartesian form
•
Equations of equilibrium
•
Concept quiz
•
3-D Example Problem
•
Group problem solving
•
Attention quiz
READING QUIZ
1) When a particle is in equilibrium, the
sum of forces acting
on it equals ___ .
(Choose the most appropriate answer)
A) a constant
B) a positive number
C) zero
D) a
negative number
E) an integer.
2) For 3-D equilibrium problems it is highly recommended
that the forces are expressed in Cartesian form.
A) True
B) False

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