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: Displacement, velocity and acceleration

  1. Sep 21, 2009 #1
    A Whale Swims due east for a distance of 3.71km, turns around and goes due west for 3.29km, and finally turns around again and heads 7.69km due east. What is the magnitude of the displacement of the whale?

    I tries to solve it using the x=xfinal-x initial
    and my final answer was -8.11km but it's wrong...What am i doing wrong?
  2. jcsd
  3. Sep 21, 2009 #2


    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper

    Perhaps they want the answer given as magnitude and direction, i.e. "east" or "west".

    Or perhaps they want you to use east as the positive direction, not negative as you did.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook