Posted by **simonsay** on Tuesday, May 14, 2013 at 1:23pm.

The truss structure ABCD is loaded with a concentrated force P = 2 kN applied at a 45° angle at joint D as indicated in the figure. All bars in the truss have equal cross sectional area and are made of the same homogeneous linear elastic material. The dimensions are H=3 m and L=8 m. Use the method of joints to obtain the axial forces in the bars and the Cartesian components of the reactions at the supports A and C.

Obtain the numerical values of the axial forces in the bars in kN.

Note: there will be factors of 2√ in your solutions. Do not use the square root symbol in your answer, just factor in the value as 1.4142.

NAB=

kN unanswered

NBC=

kN unanswered

NBD=

kN unanswered

NCD=

kN unanswered

NAD=

kN unanswered

HW4_1B : 15.0 POINTS

Obtain the numerical values of the Cartesian components of reactions at the supports in kN.

Note: there will be factors of 2√ in your solutions. Do not use the square root symbol in your answer, just factor in the value as 1.4142.

RAx=

kN unanswered

RAy=

kN unanswered

RCy=

kN unanswered

HW4_1C : 20.0 POINTS

If the elongation of bar BD is δBD=3 mm , obtain the numerical value (in mm) of the elongations of all the other bars in the truss:

δAB=

mm unanswered

δBC=

mm unanswered

δCD=

mm unanswered

δAD=

mm unanswered

- Physics -
**simonsay**, Thursday, May 16, 2013 at 4:16pm
1_A : -1.17, -1.17, 1.4142, 0.936, 2.35

1_B : -1.414, 0.702, 0.702

1_C:-4.1, -4.13,2.647,6.646

- Physics -
**simonsay**, Thursday, May 16, 2013 at 4:17pm
1_A : -1.17, -1.17, 1.4142, 0.936, 2.35

1_B : -1.414, 0.702, 0.702

1_C:-4.13, -4.13,2.647,6.646

- Physics -
**simonsay**, Thursday, May 16, 2013 at 5:18pm
4_2 part IIA RxA=4, RyA=0

4_2 part IIB RxE=4, RyE=2

- Physics -
**simonsay**, Thursday, May 16, 2013 at 5:24pm
4_2 part IIA RxA=-4, RyA=0

4_2 part IIB RxE=4, RyE=2

- Physics -
**sat**, Sunday, May 19, 2013 at 3:24am
anyone for 4_2:PartI

- Physics -
**Maga**, Sunday, May 19, 2013 at 10:16am
HW4_2: Part I please help!

- Physics -
**asdasd**, Sunday, May 19, 2013 at 3:45pm
4_2 part IIA RxA=-4, is wrong !!

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