1. Not finding help here? Sign up for a free 30min 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!

Position Vector Problem

  1. Jan 26, 2007 #1
    1. The problem statement, all variables and given/known data
    Suppose that the position function of a spaceship is r(t) = (3+t)i + (2+ln T)j + (7-4/t^2+1)k. Suppose you want the ship to coast to a space station located at (6.4.9). What time should you turn your engine off?


    2. Relevant equations

    r' = velocity. r" = acceleration.
    3. The attempt at a solution

    I guess when you turn the engine off there is no acceleration. So
    |r"| = |<0,-1/t^2,(8(t^2+1)-16t^2(t^2+1)^4)/(t^2+1)^4| = 0. But I'm not really sure what to do after that or if this is even the right approach. Any suggestions? Thanks!!
     
  2. jcsd
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Can you help with the solution or looking for help too?
Draft saved Draft deleted



Similar Discussions: Position Vector Problem
  1. Dynamics Problem (Replies: 0)

  2. Fluids problem (Replies: 0)

Loading...