1. PF Contest - Win "Conquering the Physics GRE" book! Click Here to Enter
    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 Geometrically

  1. Feb 1, 2014 #1


    User Avatar
    Gold Member

    Represent the below vector relationship geometrically, illustrating two different ways of adding vectors.

    Vector a - vector b = vector c.

    I know the above relationship can also be expressed as:

    Vector a + (-vector b) = vector c.

    In other words, we flip the direction of vector b and add as usual.

    Attached are two pictures of me adding two *arbitrary* vectors a and b (vectors a and b change in the two attached photos).

    In the first picture, I use the parallelogram rule. In the second picture, I use another method to add the arbitrary vectors a and b.

    Did I add the two vectors together correctly?

  2. jcsd
  3. Feb 2, 2014 #2

    Simon Bridge

    User Avatar
    Science Advisor
    Homework Helper

  4. Feb 2, 2014 #3


    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper

    Your problem statement has the "-" sign with vector b, but your drawing has the "-" sign on vector a instead. Other than that, you have the right idea.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted

Similar Threads - Adding Vectors Geometrically Date
Adding Vectors: Problem 2 Jun 17, 2017
Adding Vectors Jun 17, 2017
Adding Vectors Geometrically Jan 19, 2013