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anonymous

  • one year ago

Velocity Magnitude If a jet is traveling 200 mi/hr and the tail wind is 40 mi/hour what is the resulting velocity? I think it is 200+ 40 = 240 magnitude And is its counter clockwise 240 degrees too? Am I correct?

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  1. anonymous
    • one year ago
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    If it is 240 it is going South West?

  2. anonymous
    • one year ago
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    I think the magnitude is 240, but there's no info that allows you to figure out the angle

  3. anonymous
    • one year ago
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    East = 0 degree

  4. anonymous
    • one year ago
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    ok. then the angle would be 0°

  5. anonymous
    • one year ago
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    because both the plane and the wind are east

  6. anonymous
    • one year ago
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    This is what it states. The direction of a vector is often expressed as a counter clockwise angle of rotation of the vector from due east. In such a convention, East is 0 degree, North 90, West is 180 and south 270.

  7. anonymous
    • one year ago
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    I have to find the Magnitude and the direction

  8. anonymous
    • one year ago
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    oh, gotcha. I thought you were saying that the plane was traveling east. Whatever direction the plane is flying in is the angle because a tail wind by definition is in the direction of travel. |dw:1436033950387:dw| they have to tell you a direction to start with

  9. anonymous
    • one year ago
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    Ok, so we are staring with East 0 degree right?

  10. anonymous
    • one year ago
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    they really gave you speeds and asked you to find velocity

  11. anonymous
    • one year ago
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    Since we have 240 mag, which is a 45 degree we would be going in the direction of north east?

  12. anonymous
    • one year ago
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    Honestly, I don't see how you can get a direction from the information provided. I just put that up there as an example of 2 different directions having the same magnitude

  13. anonymous
    • one year ago
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    Is there maybe a picture with this problem?

  14. anonymous
    • one year ago
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    Nope, just shows the jet and the wind magnitude

  15. anonymous
    • one year ago
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    Maybe the jet is going east?

  16. anonymous
    • one year ago
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    I'd go with that. really you could go with any direction.

  17. anonymous
    • one year ago
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    I do have to calculate for Side Wind on the next problem, which will push it at a different angle

  18. anonymous
    • one year ago
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    ok. that kind of makes sense. as if it's going 0° initially and then the side wind pushes it in another direction

  19. anonymous
    • one year ago
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    still they could have made it more clear by stating explicitly that the direction was due east

  20. anonymous
    • one year ago
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    I have to calculate for Tail, Head and Side Wind... Tail shoud be 240 and Head should be 160 and I have to do the side, which the wind is coming from the north so it will push it South east

  21. anonymous
    • one year ago
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    yes

  22. anonymous
    • one year ago
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    so your angle for the head wind was also 0°?

  23. anonymous
    • one year ago
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    Yes, because it is just pushing toward the jet

  24. anonymous
    • one year ago
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    ok

  25. anonymous
    • one year ago
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    The side wind is the only thing I see that would make it change from east.

  26. anonymous
    • one year ago
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    yes it is

  27. anonymous
    • one year ago
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    Is the side wind also 40 mph ?

  28. anonymous
    • one year ago
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    Yes

  29. anonymous
    • one year ago
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    Yeah it must be east. It tells us here The direction of a vector is often expressed as a counter clockwise angle of rotation of the vector from due east. In such a convention, East is 0 degree, North 90, West is 180 and south 270

  30. anonymous
    • one year ago
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    Hummm or is it West????

  31. anonymous
    • one year ago
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    Is it going from East to West so the Plane is moving West?

  32. anonymous
    • one year ago
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    I'd stick with east. it really doesn't say and east is a reasonable guess since that's 0

  33. anonymous
    • one year ago
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    Yeah but it would move at 180 degree since it is moving at a straight line

  34. anonymous
    • one year ago
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    which 180 would be moving West

  35. anonymous
    • one year ago
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    that's kind of what I'm saying. they didn't give you and explicit direction to begin with. When you work a vector problem, it's supposed to say for example 40 mph due east, or 200 mph at 45° SE. They only gave you the magnitudes of the vectors. There's no way for you to figure out the directions. You just have to pick a assume as the starting point and work the rest of the problem with that assumed direction. Picking 0° is just the easiest starting directions

  36. anonymous
    • one year ago
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    0 degree is the starting and they stat it is east so if the jet moves with only tail or head wind, it moves at 180 degrees

  37. anonymous
    • one year ago
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    I am assuming this from this passage The direction of a vector is often expressed as a counter clockwise angle of rotation of the vector from due east. In such a convention, East is 0 degree, North 90, West is 180 and south 270

  38. anonymous
    • one year ago
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    i see what you're saying. let me draw it out

  39. anonymous
    • one year ago
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    |dw:1436035727364:dw|

  40. anonymous
    • one year ago
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    they're both still going to be at 0° because the speed of the plane is greater than both the wind's vectors

  41. anonymous
    • one year ago
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    But if it starts at 0, which it states it is often express as counter clockwise, so a jet moving straight from 0 would be 180

  42. anonymous
    • one year ago
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    0° /due east is the horizontal x-axis. The angles are expressed starting in the counter clockwise direction

  43. anonymous
    • one year ago
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    |dw:1436036333325:dw|

  44. anonymous
    • one year ago
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    So you would say East. Why they make it so confusing lol

  45. anonymous
    • one year ago
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    yeah I would. I don't know, this is just a really badly worded question

  46. anonymous
    • one year ago
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    What gets me is where it stats from due east like if you are coming from and then going to

  47. anonymous
    • one year ago
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    I always think of the start point as the origin, which makes it a little easier

  48. anonymous
    • one year ago
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    I gotta run. hopefully I was able to give some help. For the sidewind, since it's coming from the north, it will be at a 270° direction

  49. anonymous
    • one year ago
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    Yes, you are always a lot of help

  50. anonymous
    • one year ago
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    Thank you!!!

  51. anonymous
    • one year ago
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    you're welcome |dw:1436036875395:dw|

  52. anonymous
    • one year ago
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    Thanks!!!

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