1. Limited time only! Sign up for a free 30min personal 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!

Homework Help: Looking for help with physics vectors

  1. Nov 27, 2008 #1
    The problem statement, all variables and given/known data

    Let v = (-1,2,5) Find all scalars k such that llkvll = 4



    3. The attempt at a solution

    I don't know what to do plz help
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Nov 27, 2008 #2

    gabbagabbahey

    User Avatar
    Homework Helper
    Gold Member

    Re: Vectors

    v = (-1,2,5), so kv=___? And therefor ||kv||=__?
     
  4. Nov 28, 2008 #3

    Mark44

    Staff: Mentor

    Re: Vectors

    Also, || kv || = |k| ||v||
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook