4-54. The A-frame is being hoisted into an upright position by the vertical force of F= 80 lb. Determine the moment of this force about the y' axis passing through points A and B when the frame is in the position shown. 4-55. The A-frame is being hoisted into an upright position by the vertical force of F= 80 lb. Determine the moment of this force about the x axis when the frame is in the position shown. X A 6 ft 30° 15° Probs. 4-54/55 6 ft- *4-60. The A-frame is being hoisted into an upright position by the vertical force of F= 80 lb. Determine the moment of this force about the y axis when the frame is in the position shown.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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i don't not understand how to find the vectors in these problems

 

4-54. The A-frame is being hoisted into an upright
position by the vertical force of F = 80 lb. Determine the
moment of this force about the y' axis passing through
points A and B when the frame is in the position shown.
4-55. The A-frame is being hoisted into an upright
position by the vertical force of F = 80 lb. Determine the
moment of this force about the x axis when the frame is in
the position shown.
30°
6 ft
15°
Probs. 4-54/55
6 ft
*4-60. The A-frame is being hoisted into an upright
position by the vertical force of F = 80 lb. Determine the
moment of this force about the y axis when the frame is in
the position shown.
WT
F
by
Wr
rec
of
the
4.5
Transcribed Image Text:4-54. The A-frame is being hoisted into an upright position by the vertical force of F = 80 lb. Determine the moment of this force about the y' axis passing through points A and B when the frame is in the position shown. 4-55. The A-frame is being hoisted into an upright position by the vertical force of F = 80 lb. Determine the moment of this force about the x axis when the frame is in the position shown. 30° 6 ft 15° Probs. 4-54/55 6 ft *4-60. The A-frame is being hoisted into an upright position by the vertical force of F = 80 lb. Determine the moment of this force about the y axis when the frame is in the position shown. WT F by Wr rec of the 4.5
Expert Solution
Step 1

(1)

To find:

The moment about the y'-axis.

Given:

The force is F=80 lb.

The frame is shown below.

Mechanical Engineering homework question answer, step 1, image 1

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