1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Adding Vectors Numerically?

Tags:
  1. Aug 17, 2016 #1
    1. The problem statement, all variables and given/known data

    find the scale of R and angle
    2. Relevant equations

    Vector A = 100
    Vector B = 200
    3. The attempt at a solution
    I know that I need to find the answer of this equation "R = A+B" but I can't find Bx and By because of the angle
    Untitled.png
    Vectors.png
     
    Last edited by a moderator: Sep 16, 2016
  2. jcsd
  3. Aug 17, 2016 #2

    Doc Al

    User Avatar

    Staff: Mentor

    Why not?
     
  4. Aug 17, 2016 #3

    andrevdh

    User Avatar
    Homework Helper

    Don't understand your problem just apply magnitude of B x sine or cosine of the angle?
     
  5. Aug 18, 2016 #4
    I am not good at trigonometry :/ Does Bx=200cos240?
     
  6. Aug 18, 2016 #5

    Student100

    User Avatar
    Education Advisor
    Gold Member

    Yes, but you should work on your trig skills. Maybe it would be easier for you to think about it as a 60 degree angle in the third quadrant, which is negative for both sine and cosine.
     
  7. Aug 18, 2016 #6

    andrevdh

    User Avatar
    Homework Helper

    When you resolve a vector into it components you may position its tail at the origin of the coordinate system or alternatively place a x-y coordinate system at is tail.
     
  8. Aug 18, 2016 #7
    because he/she does not know how?
    any help?
     
  9. Aug 18, 2016 #8

    Doc Al

    User Avatar

    Staff: Mentor

    I wanted the OP to say what was different about B that led to a problem. (Supposedly vector A did not present a problem, but B did.)

    In any case, the question was answered.
     
  10. Aug 18, 2016 #9
    no harm done
     
  11. Sep 16, 2016 #10
    i wanted to tell you you said we will not need by and bx but when angle is given of 2 vector we will need bx and by by that only i will be able to calculate components of x and y vector and add them and find resultant
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Adding Vectors Numerically?
  1. Adding vectors (Replies: 4)

  2. Adding Vectors (Replies: 1)

  3. Adding Vectors (Replies: 3)

  4. Adding Vectors (Replies: 1)

  5. Adding Vectors (Replies: 3)

Loading...