What is the magnitude of force vector?

[ozzolins]

1. Determine the magnitude of F₂

2. How can I find this one force if I know resultant force and other force? Never done this before, that's why I've no idea.



3. Sorry, I have none.

 

[Crake]

$F_r = F_1 + F_2$

Does this help you?

The resultant force is the sum of all forces.

 

[ozzolins]

I know that, but it's a bit more complicated due to the fact that for these forces I need to find x and y components first.

 

[SteamKing]

Well, what's stopping you from finding the components?

 

[ozzolins]

Unknown F₂ value.

I came down to:

199.9 = √(0.6x+86.6)² + (0.8x + 50)²

Though, I can't (don't know how) solve this equations.


NB! I made a mistake and resultant force is 199.9 N.

 

[SteamKing]

Fr = 58.264 N
I don't know where you got 199.9 N

And you could stand an algebra refresher.

 

[ozzolins]

Fr = 58.264 N
I don't know where you got 199.9 N

And you could stand an algebra refresher.

Why do you think it's 58.264N? I made a mistake writing it down in the first post.

This is only part of exercise.

There was resultant moment given of 115 N*m, and distance between F_r and point O (where this moment happens) was 0.575 meters. So I divided 115 by 0.575m and I got resultant force of 199.9N.

Now I need to find F₂.

Anyone can help with that, please?

 

[SteamKing]

I'm sorry. The OP had a diagram asking to determine the magnitude of F2. If you want to post the correct problem you are working on, please do so.

 

[ozzolins]

Now the diagram is correct. Still can't figure out magnitude of F2.

 

[Crake]

Now the diagram is correct. Still can't figure out magnitude of F2.

It seems to me that you're not even trying. Show us what you've done to find $F_2$, show us your work.

 

[Chestermiller]

Now the diagram is correct. Still can't figure out magnitude of F2.

If you call f₂ the magnitude of F₂, what are its components in the x and y directions (in terms of f₂)?

Chet

 

[D H]

Now the diagram is correct. Still can't figure out magnitude of F2.

Is this your diagram, or is from some book / web site? What's with that 3-4-5 triangle?