Statics 1 Summary Notes

Statics 1

, Forces and equilibrium
Newton's Third Law :




The force by A the
exerted one
body on


B
other is
equal in
magnitude opposite
in direction to the force exerted by B on A
.




· When
drawing FBD replace External
,
3 Internal Forces :


↳
(Egravity
supports with reaction forces between subsystems
in
forces e .


g
:
engine car
other objects
downwards is
·
Going
+ Ve




· The sum of all rector components is O



Fres = [F j =




SUMMARY :

: O
· For 2D
analysis
-vertical equilibrium : EFv o =




-
Horizontal force equilibrium : [FH = 0


- Moment equilibrium : [Ma O =

, Moment Of A Force

EXAMPLES



· ( + 5) cW

· (-5) <W

· can choose
any point as
-a b
L



reference · Vertical
equilibrium
Fu = 0 [Ma = o


=> FGbox 1 + FGbox2 -
FA = 0 aFabox1 -

bEaboxz = 0

=> Fa =
FGbox 1 + FGbox2



·
Examples in Lecture slide / Statically equilibrium

&v = 0 -
Vertical
& FH = 0 -

Horizontal

&M = 0 -
Moment