Solving Resultant Force: F1+F2+F3 in Standard Polar Form

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Homework Help Overview

The discussion revolves around calculating the resultant force from three given forces (F1, F2, and F3) in standard polar form. The original poster mentions a missed school day and seeks assistance with the problem involving resultant forces, specifically focusing on both analytical and graphical methods of addition.

Discussion Character

  • Exploratory, Mathematical reasoning, Problem interpretation

Approaches and Questions Raised

  • Participants suggest breaking down force F2 into its horizontal and vertical components, followed by calculating the sum of the forces in each direction. There is also a mention of converting the resultant into polar form by determining its magnitude and direction.

Discussion Status

Some participants have provided guidance on resolving components and calculating the resultant force, while others have shared their calculations and sought confirmation on their results. The discussion reflects a mix of attempts at problem-solving and verification of methods without reaching a definitive conclusion.

Contextual Notes

The original poster's understanding may be limited due to missed instruction, and there is an indication of uncertainty regarding the graphical representation of the forces. The specific angle of 45 degrees is noted, but its relevance to the calculations is not fully explored.

keith421
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Missed a day of school due to a car accident in the blizzard and he went over resultant forces. Have this problem to due and I'm not quite sure on what I would do to solve this.

http://img502.imageshack.us/img502/2087/blawu.jpg

add the three forces f1 f2 and f3 both analtically and graphically to find the resultant force r = f1 + f2 + f3 give the net force r in standard polar form.

edit ; that is 45deg. by the way
 
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Hi keith421, welcome to PF.
Resolve f2 into vertical and horizontal components.T
Then find ΣFx and ΣFy. Then find the resultant.
 
Try breaking f2 into its x and y components and then take ΣFx and ΣFy.

Then put your answer into polar form by finding the magnitude of the resultant force and its direction.

Edit: Too late...
 
ok so i got the x and y component for F2, both 56.56.
i then subtracted F1 10n from F2x 56.56 which i got 46.56
then subtracted F3 30n from F2y 56.56 which got me 26.56

then square root of 46.56²+26.56² = squartroot of c. which got me 53.6n.

then did sin(26.56/53.6)= .4995. then sin-1(4.995)= 29.70.

so 53.6 N and 29.70 NE. is this correct?

what do i do for graphing?
 
Yes.
 
Thanks for the help, goodnight!
 

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