# 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

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Asked Oct 9, 2019
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## Expert Answer

Step 1

Sketch the Free Body Diagram as shown in Figure 1.

Step 2

Refer to Figure.

Use equilibrium equations:

Step 3

Consider joint E.

The magnitude of pin reaction at E is 150 lb.

Consider pin A.

There is no member forces’ acting on the member AD.

So the upward force 150 lb a...

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