marsxtc
  • marsxtc
Need help on Vectors ( Resultant, magnitude direction , was not here for lesson)
Mathematics
  • Stacey Warren - Expert brainly.com
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katieb
  • katieb
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anonymous
  • anonymous
I would probably contact your teacher or a fellow student for help
marsxtc
  • marsxtc
|dw:1362001343487:dw|
marsxtc
  • marsxtc
I dont understand the question, it asks for me to use a graphing utility to graph it and find the resultant , and magnitude / direction?

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anonymous
  • anonymous
there is a free graphing program online that is pretty helpful what does the actual problem say
marsxtc
  • marsxtc
says that ^
amistre64
  • amistre64
the resultant is vector is simliar to an average of the 2 vectors|dw:1362001906941:dw|
marsxtc
  • marsxtc
I know its similar, but I'm more of it being xi+xj, at this point I don't understand
anonymous
  • anonymous
don't you multiply all 3 numbers it's been awhile since I've done this kind of stuff
amistre64
  • amistre64
the ij parts are notations that are rather pointless in my opinion. the just stand for the xy compnent parts
amistre64
  • amistre64
the magnitude can be found using law of cosines, but youll have to add 180 one of the vectors to use it
amistre64
  • amistre64
is that 82 and 12 degrees? with 12 and 8 magnitudes?
marsxtc
  • marsxtc
Its 82 and 12 degrees, and the magnitude of the above is 12 and the below is 8
amistre64
  • amistre64
|dw:1362002125432:dw|
amistre64
  • amistre64
the component parts of the individual vectors uses sin and cos of their angles times their length <12cos(82),12sin(82)> and <8cos(360-12),8sin(360-12)>
amistre64
  • amistre64
you can subtract the components parts to get the resultant components
marsxtc
  • marsxtc
To find direction isn't the equation tan-1)= b/a?
amistre64
  • amistre64
it can be i spose. that would be the inverse tangent of the resultant vector components
amistre64
  • amistre64
say your vectors are something more readable like: <3,4> and <1,1> the resultant is just the subtraction of one from the other <3,4> - <1,1> ------- <2,3> the direction is then that tan^-1 (3/2)
amistre64
  • amistre64
or am i confusing things again?
amistre64
  • amistre64
|dw:1362002809662:dw|
amistre64
  • amistre64
ok, resultant is a+b, not a-b :)

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