chapter one introduction to mechanics one

engineering mechanics 1

6. Different Systems

12. se supports transmit a
pressive force normal tothe

[the pin is free to tum. IF it
reports à cou

A in or fixed support

13. A

15. Solution
Caleulate the support reactions

BF yO: 00.C,-0 2. C,-600

meo +7

(40083) (Ax) + (600

Ayrsoon

LR 0: 400+ G,-600-0
2008

The analysis now stars at either joint A or €

ont a

EF 0: Fa Sin 0600-0

vt
L,

Fan "7508 (Compression)
BF 0: Fan Cos!

Faos4S0N (Tension)

Joint D

> 0: Fog" -250N

BED: Fc 200N (Compressive)

16. EF 0: Feg600N (Compr

NOTE: The method in al member ofa ts ar require

SOON 4OOHN 1400MN Vo

19. (6) Truss markod after nding Fig 2.1 (0) Eioct in

members CD and CF me

20. an

/=S00KN 4ODKN 1400 kN
Fig. P 2.1. () Given Ih forces introduced in various members

of Results

+ for Tension ; - for compression

Member Force Types of membe

|
28 +450 Ka Lower chord
BC 800 kN Mem
co 500 kN
AE 750 A
DF kN
|
|

End
member
EF EN upper chord member
BE EN
cr KN

BF kN

verticals

23. 1200KN 1O00KN BOO KN 00 KN

26. ‘Types of Beam
nply
Beam

Beam with an

Description
À beam with a pin s
‘oneend (A) andarollersupport
at the other (B). Horizontal
and vertical reactions at pin
support and vertical reaction
at roller support.

A beam which is fixed at one
nd (A) and free at the ot
Horizontal, — vertical — and
moment reactions at fixed

A beam which is simply

supported at one end (A)
intermediate support/supposts

(8) and also projects beyo

the support

Example and Free Bo

ly Diagrai