آموزش استاتیک - بخش یکم

faradars.org/fvmec94053

faradars.org/fvmec94053

:

1

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faradars.org/fvmec94053

faradars.org/fvmec94053

: - :

2

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faradars.org/fvmec94053

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: - -

3- 4- 5- 6- 7- 8- 9-

0- -

3

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faradars.org/fvmec94053

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-

.

.

4

FaraDars.org

faradars.org/fvmec94053

faradars.org/fvmec94053-

SI BS

M

L

T

F

Kg

m

s

N

Slug

ft

s

Ib

5 = N = kg

m

s2 = =

2

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faradars.org/fvmec94053

faradars.org/fvmec94053

3-

Rigid Body

Particle

6

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faradars.org/fvmec94053

faradars.org/fvmec94053

4-

:

.

:.

:.

7

FaraDars.org

faradars.org/fvmec94053

faradars.org/fvmec94053

5-

Scalar Quantities

Vectors Quantities

Free Vector Transmissible Vector Bound Vector

8

FaraDars.org

faradars.org/fvmec94053

faradars.org/fvmec94053

6-

= +

+

P P P

=P.cos=P.sin

9

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faradars.org/fvmec94053

faradars.org/fvmec94053

+ = , + = + =

= +

+

R = ( Fx)2 + ( Fy)

2 ( )

R = ( Fx)2 + ( Fy)

2 + ( Fz)2 ( )

10

FaraDars.org

faradars.org/fvmec94053

faradars.org/fvmec94053

Unit Vector =

11

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faradars.org/fvmec94053

faradars.org/fvmec94053

Scalar product .= . cos

B A A (

B) . cos =

.

B

A

12

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faradars.org/fvmec94053

faradars.org/fvmec94053

Cross Product

13

FaraDars.org

faradars.org/fvmec94053

faradars.org/fvmec94053 Complex Product

14

FaraDars.org

faradars.org/fvmec94053

faradars.org/fvmec94053

1 = 3 2 = 2 + 3 = 3 + 2 . (1+2 3)

x N 140

100 N

120 N F

y

x

30

15

FaraDars.org

faradars.org/fvmec94053

faradars.org/fvmec94053

) .)

16

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faradars.org/fvmec94053

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17

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faradars.org/fvmec94053

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18

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19

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faradars.org/fvmec94053

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20

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faradars.org/fvmec94053

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21

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faradars.org/fvmec94053

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22

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faradars.org/fvmec94053

faradars.org/fvmec94053

23

FaraDars.org

faradars.org/fvmec94053

faradars.org/fvmec94053

24

FaraDars.org

faradars.org/fvmec94053

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25

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faradars.org/fvmec94053

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26

FaraDars.org

faradars.org/fvmec94053

faradars.org/fvmec94053

: . CD B A

N 200 .A C

27

FaraDars.org

faradars.org/fvmec94053

faradars.org/fvmec94053

12896120

08.003.0

kji

M A

kjiM A

mN 8.82mN 8.82mN 68.7

jirrr ACAC

m 08.0m 3.0

FrM ACA

kji

kji

r

rFF

DC

DC

N 128N 69N 120

m 5.0

m 32.0m 0.24m 3.0N 200

N 200

28

FaraDars.org

faradars.org/fvmec94053

faradars.org/fvmec94053 :

FrMM OOL

.( )

BABA

BA

BBL

rrr

Fr

MM

29

FaraDars.org

faradars.org/fvmec94053

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:

30

FaraDars.org

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faradars.org/fvmec94053 :

.

31

FaraDars.org

faradars.org/fvmec94053

faradars.org/fvmec94053

8-

R = F = 0 , M = M = 0

32

FaraDars.org

faradars.org/fvmec94053

faradars.org/fvmec94053

33

FaraDars.org

faradars.org/fvmec94053

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34

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35

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FaraDars.org

faradars.org/fvmec94053

faradars.org/fvmec94053

: kg400 kg000

. B A . G .

.B A

0m6kN5.23

m2kN81.9m5.1:0

BM A

kN1.107B

0:0 BAF xx

kN1.107xA

0kN5.23kN81.9:0 yy AF

kN 3.33yA 40

FaraDars.org

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: 50

.E .

0kN1505.7

5.4:0 xx EF

kN 0.90xE

0kN1505.7

6kN204:0 yy EF

kN 200yE

:0EM

0m5.4kN1505.7

6

m8.1kN20m6.3kN20

m4.5kN20m7.2kN20

EM

mkN0.180 EM41

FaraDars.org

faradars.org/fvmec94053

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42

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44

: CG) A

. ( w=200 lb 60

CG

A

2010

60

CG

A

RT

30

O

L

60

30

CG1

2

3

O

200

tan =20

tan60 =

10 = 10 tan60

tan =20

10 tan60 tan = 1/155 = 49/1

sin = 0/755 = 180 (49/1 + 30)=100/9

sin30=200

sin=

sin

=200 sin30

sin100/9= 102

=200

sin100/9sin =

153

5

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45

:

000

000

zyx

zyx

MMM

FFF

FaraDars.org

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46

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faradars.org/fvmec94053

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47

:

W=mg=200*9/18=1962 N

FaraDars.org

faradars.org/fvmec94053

faradars.org/fvmec94053

48

:

W=-(270 lb)j

FaraDars.org

faradars.org/fvmec94053

faradars.org/fvmec94053

49

9-

:

. .

: 30

1m4 100

50 80100

FaraDars.org

faradars.org/fvmec94053

faradars.org/fvmec94053

50

0-

: % 35

SI BS . :

. ....( ) :

. ( )

( ) :

FaraDars.org

faradars.org/fvmec94053

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51

-

w - F

) = 2221

F

(2 =22

3(21)F

(3 =21

22F

(4 =3(21)

22F

9

= 0 2 = 0 =

2

= 0 2 +

2 1

2 2 = 0 =

222 1

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faradars.org/fvmec94053

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52

N.m80 . - A p 00

( B )

(1708/(2047(3800(44068

= 0 , 375 103 + 80 = 0 = 213/34

= 0 , 213/34 425 50 3 = 0 = 1047

88

80

= 213/34 N

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53

.

.

faradars.org/fvmec94053

FaraDars.org

http://faradars.org/fvmec94053