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: Exam coming soon, need help with this question!

  1. Feb 29, 2008 #1
    Exam coming soon, need urgent help with this question!

    1. The problem statement, all variables and given/known data
    A body leaves a point A and moves in a straight line with a constant velocity of 40m/s. Ten seconds later another body which is at rest at A is given an accelleration of 2m/s2 and moves in the same direction as the first body. How long does it take the second body to catch up with the first? How far from A does this occur?

    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
  3. Feb 29, 2008 #2
    Use these:

    and come back with specific doubts.:rolleyes:
  4. Mar 1, 2008 #3
    I know im suppsed to use those equations but i dont know how? I dont know what to do with the 10 seconds.
  5. Mar 1, 2008 #4


    User Avatar
    Science Advisor
    Homework Helper

    Draw a picture!

    Sometimes a picture makes things clearer.

    Draw it for yourself (only roughly) on a graph (distance against time).

    Then I think you'll see where the 10 seconds comes in. :smile:
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook