Replace the three forces which act on the bent bar by a force-couple system at the support point A. Then determine the x-intercept of the line of action of the stand-alone resultant force R. 2/85 While sliding a desk toward the doorway, three stu- dents exert the forces shown in the overhead view. Determine the equivalent force-couple system at point A. Then determine the equation of the line of uction of the resultant force. Ans. R- 451 - 15j Ib, M,- -1650k Ib-in. Ans. R- 400i - 3010j lb MA 18,190 lb-f Cw *- 6.05 R 110 y---+ 3. 2500 lb 15 lb 25 Ib 1200 lb 30 so0 lb 20 Ib Problem 2/83 Two integral pulleys are subjected to the belt ten- sions shown. If the resultant R of these forces passes through the center 0, determine T and the magni- tude of R and the counterclockwise angle 0it makes with the x-axis. Problem 2/as 2/86 The aymmetrie roof truss is of the type used when a near normal angle of incidence of sunlight onto the south-facing surface ABC is desiruble for solar energy purposes. The five vertical loads represent the effect of the weights of the truss and supported roofing ma- terials. The 400-N load represents the effect of wind pressure. Determine the equivalent force-couple sys- tem at A. Also, compute the x-intercept of the line of action of the system resultant treated as a single 160 N 200 N 30 200 mm 100 mm force R. 500 N 30 500 N 150 N 400 N 500 N 250 N 250 N Problem 2/84 AV60 30 30 5m
Replace the three forces which act on the bent bar by a force-couple system at the support point A. Then determine the x-intercept of the line of action of the stand-alone resultant force R. 2/85 While sliding a desk toward the doorway, three stu- dents exert the forces shown in the overhead view. Determine the equivalent force-couple system at point A. Then determine the equation of the line of uction of the resultant force. Ans. R- 451 - 15j Ib, M,- -1650k Ib-in. Ans. R- 400i - 3010j lb MA 18,190 lb-f Cw *- 6.05 R 110 y---+ 3. 2500 lb 15 lb 25 Ib 1200 lb 30 so0 lb 20 Ib Problem 2/83 Two integral pulleys are subjected to the belt ten- sions shown. If the resultant R of these forces passes through the center 0, determine T and the magni- tude of R and the counterclockwise angle 0it makes with the x-axis. Problem 2/as 2/86 The aymmetrie roof truss is of the type used when a near normal angle of incidence of sunlight onto the south-facing surface ABC is desiruble for solar energy purposes. The five vertical loads represent the effect of the weights of the truss and supported roofing ma- terials. The 400-N load represents the effect of wind pressure. Determine the equivalent force-couple sys- tem at A. Also, compute the x-intercept of the line of action of the system resultant treated as a single 160 N 200 N 30 200 mm 100 mm force R. 500 N 30 500 N 150 N 400 N 500 N 250 N 250 N Problem 2/84 AV60 30 30 5m
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Question
Transcribed Image Text:Replace the three forces which act on the bent bar
by a force-couple system at the support point A.
Then determine the x-intercept of the line of action
of the stand-alone resultant force R.
2/85 While sliding a desk toward the doorway, three stu-
dents exert the forces shown in the overhead view.
Determine the equivalent force-couple system at
point A. Then determine the equation of the line of
uction of the resultant force.
Ans. R- 451 - 15j Ib, M,- -1650k Ib-in.
Ans. R- 400i - 3010j lb
MA 18,190 lb-f Cw
*- 6.05 R
110
y---+
3.
2500 lb
15 lb
25 Ib
1200 lb
30
so0 lb
20 Ib
Problem 2/83
Two integral pulleys are subjected to the belt ten-
sions shown. If the resultant R of these forces passes
through the center 0, determine T and the magni-
tude of R and the counterclockwise angle 0it makes
with the x-axis.
Problem 2/as
2/86 The aymmetrie roof truss is of the type used when
a near normal angle of incidence of sunlight onto the
south-facing surface ABC is desiruble for solar energy
purposes. The five vertical loads represent the effect
of the weights of the truss and supported roofing ma-
terials. The 400-N load represents the effect of wind
pressure. Determine the equivalent force-couple sys-
tem at A. Also, compute the x-intercept of the line of
action of the system resultant treated as a single
160 N
200 N
30
200 mm
100
mm
force R.
500 N
30
500 N
150 N
400 N
500 N
250 N
250 N
Problem 2/84
AV60
30
30
5m
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