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Imtant

  • one year ago

Determine the components i and j for each vector below. Determine the resultant of the vectors in the i and j.

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  1. Imtant
    • one year ago
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    |dw:1365385899074:dw|

  2. dave0616
    • one year ago
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    Are the components for F3 correct?

  3. dave0616
    • one year ago
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    Meaning are those given to you?

  4. Imtant
    • one year ago
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    yes,it is.

  5. dave0616
    • one year ago
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    Ok, well how i was taught to do vectors was to use right triangle trig. Do you have a background in using i and j form? (which are also known as unit vectors)

  6. Imtant
    • one year ago
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    not at all.just i know that i for x axis and j for y axis.

  7. dave0616
    • one year ago
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    and that is all you need to know. are you familiar with the cartesian coordinate system? and how you write a point (x,y)?

  8. Imtant
    • one year ago
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    it is like this? Ri=58 cos 30 degree+50 cos 135 degree+45 sod 112.3 degree + 40 cos 112.7 degree? it's for the i component..

  9. dave0616
    • one year ago
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    are you looking for the i and j of the entire system? or each vector on its own? because that equation you just posted would be for the entire system, and it still would not be correct

  10. Imtant
    • one year ago
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    no,each vector.

  11. dave0616
    • one year ago
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    since you are confused, the easiest vector to solve is for F4. F4 is moving in the positive x direction with a force of 40kN, think about this not so much as a force, but just as a point. And there is no pull in the y direction. so the force will will have a vector notation of 40i+0j

  12. dave0616
    • one year ago
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    next lets take on F1. |dw:1365392293558:dw| remember SOH-CAH-TOA sin(30)=y/58 sin(30)*58=y 29=y cos(30)=x/58 cos(30)*58=x x=50.23 so the vector notation for F2= 50.23i + 29j

  13. dave0616
    • one year ago
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    does that make sense? I am sorry, my drawing got cut off. |dw:1365392671955:dw|

  14. Imtant
    • one year ago
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    Ok,i get it.but is there a mistake?this is for f1 right?

  15. Imtant
    • one year ago
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    vector notation for f1?right?

  16. dave0616
    • one year ago
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    this is for F1, i dont believe there is a mistake, but i am human haha, what is the mistake that you are noticing?

  17. Imtant
    • one year ago
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    it is f2.

  18. dave0616
    • one year ago
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    I solved for the vector in the first quadrant with the f value of 58kN. I'm not sure if you labeled them wrong or something, but that is the vector is solved for

  19. Imtant
    • one year ago
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    but it's ok,dave.thanks.

  20. dave0616
    • one year ago
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    do you understand what I did? Like am i actually helping you? or confusing you more and should just quit trying to help? haha

  21. Imtant
    • one year ago
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    yes,i had already understand it.don't feel like that,Dave.thanks again. :)

  22. dave0616
    • one year ago
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    ok no problem! i just dont want to confuse you more! do you need more help? Just remember that when a vector is facing a negative direction, that part of the form will be negative i.e. F2, the form will take -i+j

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