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!

Vectors physics

  1. Jul 8, 2015 #1
    A car travels 10 km due EAST then 12. Km NW what is Magnitude of the car's displacement.

    The answer that I got in my book is 8.8
    Could anyone-please-explain ?


    3. The attempt at a solution
    6.6 km
     
  2. jcsd
  3. Jul 8, 2015 #2

    haruspex

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member
    2016 Award

    I got 8.6. We can't tell where your mistake is until you post your working.
     
  4. Jul 8, 2015 #3
    ***I made a mistake .. The answer in the book is 8.6***


    I've just applied Pythagorean theorem to get the answer !!
    144 = 100+X^2

    Could please explain your answer?
     
  5. Jul 8, 2015 #4

    haruspex

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member
    2016 Award

    It is not a right-angled triangle. Do you know a rule for finding the third side of a triangle given two sides and the angle between them?
     
  6. Jul 8, 2015 #5
    Yea..I got the idea

    C^2=a^2+b^2- 2bc COSa
    But still don't know how to get the angle's value
     
  7. Jul 8, 2015 #6

    haruspex

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member
    2016 Award

    Draw yourself a diagram.
     
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: Vectors physics
  1. Vectors in Physics (Replies: 1)

  2. Vectors in physics (Replies: 2)

  3. Vectors and Physics (Replies: 8)

  4. Physics- vectors (Replies: 1)

  5. Physics Vectors (Replies: 3)

Loading...