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Ac3

  • one year ago

The two vectors a with arrow and b with arrow in the figure below have equal magnitudes of 11.7 m and their angles are θ1 = 30° and θ2 = 106°. (a) Find the x and y components of their vector sum r with arrow. (Express your answer in vector form.) (b) Find the magnitude of r with arrow. (c) Find the angle r with arrow makes with the positive x axis

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  1. Ac3
    • one year ago
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    a and b*

  2. Ac3
    • one year ago
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  3. anonymous
    • one year ago
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    |dw:1442290286516:dw|

  4. anonymous
    • one year ago
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    Vector form is i and j, i represent x direction j represent y direction. like 5i+6j is 5 coordinates to the right and 6 to the north. -5i-6j would be 5 coordinate to the left and 6 to the south.

  5. Ac3
    • one year ago
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    what are the scalars for i and j of the resultant?

  6. Ac3
    • one year ago
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    I know how to do this but keep getting the wrong answer for some reason.

  7. anonymous
    • one year ago
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    |dw:1442290582101:dw|

  8. anonymous
    • one year ago
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    Angle 1 and 3 are corresponding angles so they are the same. Subtract 180 degrees from the (angles of 2 and 3) to get angle 5.

  9. anonymous
    • one year ago
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    |dw:1442290969817:dw|

  10. anonymous
    • one year ago
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    cos30=x/11.7 so 11.7cos30=x You would get the x component for vector A sin30=y/11.7 so 11.7sin30=y You would get the y component for Vector B

  11. anonymous
    • one year ago
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    Now try to get the x and y component for vector B. After you get both, you would add the x component of vector A and B together to get the displacement or resultant x component. Then do the same to get the resultant vectors y component.

  12. Ac3
    • one year ago
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    That's the one I'm having trouble with Vector B

  13. Ac3
    • one year ago
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    For vector A we can definitely do what you said, but not for vector B because it has a 106 degree angle.

  14. Ac3
    • one year ago
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    Either that or my calculator is stupid.

  15. Ac3
    • one year ago
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    ok so 164

  16. Ac3
    • one year ago
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    ahhhh i see

  17. anonymous
    • one year ago
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    Take that back.

  18. Ac3
    • one year ago
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    I got -1.1 for the I of the resultant

  19. Ac3
    • one year ago
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    Then what is it?

  20. anonymous
    • one year ago
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    Nevermind, it works.

  21. Ac3
    • one year ago
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    What do you get for the i and j values of the resultant?

  22. anonymous
    • one year ago
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    How did you get 164 if you add 90 angles to angle 5?

  23. Ac3
    • one year ago
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    angle 5 is 74

  24. Ac3
    • one year ago
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    5,3 and 2 must add up to 180

  25. anonymous
    • one year ago
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    Show me your math.

  26. anonymous
    • one year ago
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    On how you get 74

  27. Ac3
    • one year ago
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    Actually I can't even remember how I got to 74 now that I think of it.

  28. anonymous
    • one year ago
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    180-30-106=?

  29. Ac3
    • one year ago
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    oh yea 180=106

  30. Ac3
    • one year ago
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    180-106

  31. anonymous
    • one year ago
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    180=106?

  32. anonymous
    • one year ago
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    Thats only 2. You wrote angle 5,3,2 must add up to 180.

  33. Ac3
    • one year ago
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    nvm on that.

  34. Ac3
    • one year ago
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    5, and 2 must add up to 180

  35. anonymous
    • one year ago
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    You were right on that. And I said your 74 degrees on angle 5 is wrong. Look at my drawings again.

  36. anonymous
    • one year ago
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    |dw:1442292054233:dw|

  37. anonymous
    • one year ago
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    |dw:1442292116154:dw|

  38. Ac3
    • one year ago
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    then how do i find 5 and 2?

  39. anonymous
    • one year ago
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    Look at your problem and information, not given by me.

  40. Ac3
    • one year ago
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    That picture plus the words are the only information.

  41. anonymous
    • one year ago
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    What is angle 3?

  42. Ac3
    • one year ago
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    30

  43. Ac3
    • one year ago
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    that doesn't help

  44. anonymous
    • one year ago
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    and how do you know it is 30 degrees. Wait up and you will see ok?

  45. Ac3
    • one year ago
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    It's a geometry rule.

  46. anonymous
    • one year ago
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    And how did you know angle 1 is 30 degrees?

  47. anonymous
    • one year ago
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    Hint: information

  48. anonymous
    • one year ago
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    So what is angle 2?

  49. anonymous
    • one year ago
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    |dw:1442292824398:dw|

  50. Ac3
    • one year ago
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    I have no idea

  51. Ac3
    • one year ago
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    oh is that the 106?

  52. Ac3
    • one year ago
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    Ok so I figured that out angle 5 is 44

  53. anonymous
    • one year ago
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    But how did you know angle 1 is 30 degrees? Please reread. -_-

  54. Ac3
    • one year ago
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    It's a given

  55. anonymous
    • one year ago
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    Yes it is 44

  56. anonymous
    • one year ago
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    Whenever there is an angle that is not 0 or 90 or 180 degrees, I do not just assume the angle number. It has to be given by the information.

  57. anonymous
    • one year ago
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    I cant just guess that angle 1 is 30 degrees without info.

  58. Ac3
    • one year ago
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    angle 1 is 30 that's a given.

  59. anonymous
    • one year ago
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    Yes, so you should have no trouble knowing what angle 2 is. Always read your question and information carefully. It helps a lot in physics.

  60. anonymous
    • one year ago
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    If I dont know what angle 2, I would not figure out how to do this.

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