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!

Another Uncertainty with Equations question

  1. Jan 15, 2012 #1
    1. The problem statement, all variables and given/known data

    A useful kinematic equation is

    (vf)^2 = (vi)^2 + 2ad

    You drop a ball (with zero initial velocity) from the top of a building to measure the acceleration due to gravity. If you measure the final velocity to be vf ± ∆vf, and the height of the building to be d ± ∆d, what is the relative uncertainty in your determination of the acceleration?

    2. Relevant equations

    Uncertainties equations, propagation of error.

    3. The attempt at a solution

    This time I'm really not sure. Should I first rearrange the equation to solve for acceleration, and then do my propagation of error? Or do I take it as it is right now?
     
  2. jcsd
  3. Jan 15, 2012 #2
    yes I think you should solve for acceleration, and you just drop vi because its zero and the uncertainty in that is negligible.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Another Uncertainty with Equations question
  1. Uncertainty equations? (Replies: 1)

  2. Uncertainty Question (Replies: 0)

Loading...