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!

Finding uniformly increasing acceleration.

  1. Dec 3, 2011 #1
    1. The problem statement, all variables and given/known data

    What is the acceleration of a rocket that travels uniformly from rest and travels 650m in the first 12 seconds.


    2. Relevant equations

    [tex]s=v_it+\frac{1}{2}at^2[/tex]

    [tex]a=\frac{\Delta v}{\Delta t}[/tex]

    3. The attempt at a solution

    I pluged the acceleration equation in to the first equation.

    [tex]s=0(12)+\frac{1}{2}\frac{650}{12}12^2[/tex]

    that equaled 7800 m/s squared. That is so far off. The answer is 9 m/s squared.
     
  2. jcsd
  3. Dec 3, 2011 #2

    cepheid

    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    You dont need the second equation, and it's not useful because you don't know what the change in v was.

    The first equation is perfectly adequate. You know s, you know vi and you know t. Solve for a.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Finding uniformly increasing acceleration.
  1. Uniform acceleration (Replies: 21)

  2. Uniform acceleration (Replies: 1)

Loading...