Engineering Mechanics Categories of Equilibrium in Two Dimensions

1. Categories of Equilibrium in Two Dimensions
Prof. P. Rajayogan M. Tech., MISTE., MASCE., FACCE, FIE., +91 9486026085 Email Id
rajayoganp@gmail.com
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Date: 2014.09.22
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2. Collinear Force System
Free-body Diagram
Fx  0
x
F1
F2
F3
Independent Equations

3. Concurrent (at a point) Force System
Free-body Diagram
Fx  0
F1
F2 F3
F4
x
y
Independent Equations
Fy  0

4. Parallel Force System
Free-body Diagram
Fx  0
F1
F2
F3
F4
Independent Equations
0
z
M 

5. Parallel Force System
Free-body Diagram
Fy  0 F4
F1
F2
F3
Independent Equations
Mz  0

6. General Force System
Free-body Diagram
F1
F2
F3
F4
x
y
M
Independent Equations Fx  0 Fy  0
0
z
M 