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: Velocity and space and force over distance

  1. Jan 27, 2010 #1
    1. The problem statement, all variables and given/known data
    A 5.5e4kg space probe is traveling at a speed of 10000 m/s through deep space. Retrorockets are fired along the line of motion to reduce the probe's speed. The retrorockets generate a force of 5.0e5N over a distance of 2500 km. What is the final speed of the probe?


    2. Relevant equations
    velocity=10000
    Force=
    5e5
    displacement=2500

    3. The attempt at a solution
    I just know the kinematics equations. BUt I have no idea how to start.
     
  2. jcsd
  3. Jan 28, 2010 #2

    tiny-tim

    User Avatar
    Science Advisor
    Homework Helper

    Hi copitlory8! :smile:

    You have force and distance, so use the work-energy theorem. :wink:
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook