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!

Dropping a rock on mars

  1. Oct 5, 2008 #1
    1. The problem statement, all variables and given/known data

    An astronaut on Mars drops a rock straight downward from a height of 0.90 m. If the acceleration of gravity on Mars is 3.73 m/s2, what is the speed of the rock when it lands?
    find m/s

    3. The attempt at a solution

    squareroot .2413=.491

    it was wrong what equation am i suppose to use?
  2. jcsd
  3. Oct 5, 2008 #2
    There is an easier equation that you can use : Vf^2 = Vo^2 + 2ad.

    Also, just a suggestion, it's a lot easier to help you when you put units on your answers.
  4. Oct 5, 2008 #3
    ill remember that
  5. Oct 5, 2008 #4
    I got the right answer I think I am just having a hard time with what equations I have to use.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?