Engineering Mechanics - Force Vectors - Discussion
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Read more:"Life is like riding a bicycle. To keep your balance you must keep moving."
- Albert Einstein
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Determine the magnitude and direction of the resultant force. |
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R = 80.3 lb,  = 106.2° CCW | | [B]. |
R = 80.3 lb, = 73.8° CCW | | [C]. |
R = 72.1 lb, = 63.6° CCW | | [D]. |
R = 72.1 lb, = 116.4° CCW |
Answer: Option B
Explanation:
No answer description available for this question.
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Sajun said:
(Tue, Jan 10, 2012 04:17:23 PM)
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Its simple.
By adding the why components and x components vectoricaly we are able to get the answer. |
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Dan said:
(Sun, Jan 22, 2012 02:38:20 AM)
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| Are you sure A is the right answer? you might want to find the tangent again. |
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Sathish Uthayasuriyan said:
(Tue, Apr 10, 2012 03:19:58 PM)
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| If we take tangent of these two the answer will be Option B. |
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Snehasish said:
(Tue, Jun 19, 2012 09:52:57 AM)
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| CCW means angle makes from west corner (-ve X-axis) i.e. 180 - 73.77 = 106.228 ~ 106.2. |
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Cj Manglalan said:
(Sun, Jul 22, 2012 02:28:50 PM)
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CCW I THINK IT MEANS IT ROTATES Counter ClockkWise
FOR F:
F1x= (60 lb) (cos 45)= 42.426
f1y= 42.426 (sin 45=cos45) or (60 lb)(sin 45)
FOR P:
p1x= (40lb)(sin 30) = 20
p1y= (40lb)(cos 30) =34.641
sumamtion of forces along x =42.426 + 20 = -22.426
summation of forces along y =42.426 + 34.641 = 77.067
for R:
R= square root of (((-22.426)square)+ ((77.067)square))
for angle:
=arc tangent (y/x)
=arc tangent (77.067/-22.426) = -73.8
since the angle is negative you will subtract it to 180
the angle is
180-73.8 = 106.2 |
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