12 ft8 ft403010 ftE6 ftFig. P4.177Fig.P4.1782 ft4.178 Deternmine the angle d or which the uniform bar of length L and weightwwill be in equilibrium. Neglect friction900 lb f3 ft4.179 Determine the magnitudes of the pin reactions at A, C, and E. Neglectthe weight of the frame.E6 ft4.180 Calculate the forces in members (a) DE; (b) BE, and (c) BC. Indicatetension or compres sion.Fig. P4.179

Question
Asked Oct 9, 2019
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12 ft
8 ft
40
30
10 ft
E
6 ft
Fig. P4.177
Fig.P4.178
2 ft
4.178 Deternmine the angle d or which the uniform bar of length L and weight
wwill be in equilibrium. Neglect friction
900 lb f
3 ft
4.179 Determine the magnitudes of the pin reactions at A, C, and E. Neglect
the weight of the frame.
E
6 ft
4.180 Calculate the forces in members (a) DE; (b) BE, and (c) BC. Indicate
tension or compres sion.
Fig. P4.179
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12 ft 8 ft 40 30 10 ft E 6 ft Fig. P4.177 Fig.P4.178 2 ft 4.178 Deternmine the angle d or which the uniform bar of length L and weight wwill be in equilibrium. Neglect friction 900 lb f 3 ft 4.179 Determine the magnitudes of the pin reactions at A, C, and E. Neglect the weight of the frame. E 6 ft 4.180 Calculate the forces in members (a) DE; (b) BE, and (c) BC. Indicate tension or compres sion. Fig. P4.179

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Expert Answer

Step 1

Show the free body diagram of the frame as in Figure (1).

 

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6 ft 2 ft C 900 lb ft 3 ft E 6 ft Eg

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Step 2

Take moment about point E:

Consider clockwise moment as positive and counter clockwise moment as negative.

Consider upward force as positive, downward force as negative, force towards right as positive and the force towards left as negativ...

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