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There HAS to be a mistake in this question (simple vectors question) please look

  • #1
Femme_physics
Gold Member
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Homework Statement



Force R that acts on point O, is the combined force of two forces: Q that's applied horizontally, and F, whose line of action is along OB. (I think it ought to be an arrow there instead of a line)... Calculate Q and F, if R is 550 [N]

http://img87.imageshack.us/img87/705/38305098.jpg [Broken]


The Attempt at a Solution




Well, as you can see, R - the combined vector, is not pointing where it should! That doesn't make sense.

In addition, according to the answers

Q = 568.58 [N]
F = 197.47 [N]

How can Q be greater than the combined vector if they're not opposite to each other?

-Femme_physics (formerly Dory)
 
Last edited by a moderator:

Answers and Replies

  • #2
Femme_physics
Gold Member
2,547
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Sorry, I fixed the image now
 
  • #3
Femme_physics
Gold Member
2,547
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Ah I see it for myself now.. it acts ALONG OB, the arrow is actually reverse from the drawn line....
 
  • #4
Femme_physics
Gold Member
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Trying to solve for the question at hand...no result I get is the correct result... :(

What am I doing wrong? I tried 3 different triangles and none of them work!
 

Attachments

  • #5
tiny-tim
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Homework Helper
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Hi Femme_physics! :smile:

Why did you change your name?

(It wasn't something I said, was it?)
What am I doing wrong?
Nothing … the whole universe is against you! :redface:

The question should say 500, not 550. :biggrin:

(I checked using the sine rule)
 
  • #6
Femme_physics
Gold Member
2,547
1


Ah...w00t! :) So there IS a mistake!!!

(It wasn't something I said, was it?)
Yes! Yes it was! But, it just reinforced my feelings that Dory can be construed as a MALE name as opposed to female... so I changed it... on second thought I should've went with Dora, but I don't wanna drive the mods here crazy so I'll leave it as is....thanks tim!
 

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