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!

Height of a object

  1. Jul 22, 2009 #1
    I need help. I need to know how high an object goes if launched, travels up and back down, and lands 9 seconds later. I remember that in a vacuum, the travel time up equals the travel time down, but what is the equation?
     
  2. jcsd
  3. Jul 22, 2009 #2

    negitron

    User Avatar
    Science Advisor

    The only thing you need to know, other than some basic algebra, is that the acceleration due to gravity is ~9.8 m/s2. Think about what that unit really means and it should be easy to solve.
     
  4. Jul 22, 2009 #3

    tiny-tim

    User Avatar
    Science Advisor
    Homework Helper

    Welcome to PF!

    Hi charles7! Welcome to PF! :wink:

    Use the standard constant acceleration equations. :smile:
     
  5. Jul 22, 2009 #4
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook