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!

VERY simple question about motion

  1. Feb 18, 2006 #1
    Okay, this is highschool physics I know but I still need to ask it.

    Say I give something a constant acceleration A straight up into the air (A = [0,0,+Az]). If I ignore drag, then the object's z-velocity as a function of time with this constant acceleration will be

    (Az - g)t

    (where Az is the z-component of the acceleration) if the initial z-velocity at time t = 0 is 0. Am I correct?

    Next question: say that an object is travelling straight up through the air with a constant velocity V0. Is the object's z-position as a function of time equal to

    V0t - 0.5gt^2 + Z0

    (where Z0 is the initial z position) or is it something else?

    Sorry if I didn't word these questions right - I'm still very new to this.
     
  2. jcsd
  3. Feb 18, 2006 #2
    If the object were traveling straight up at a constant velocity you wouldn't have the 0.5gt^2 term, this case would be equivilant to having Az=g in your previous example.
     
  4. Feb 18, 2006 #3

    nrqed

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?