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!

Homework Help: How do I calculate these Uncertainties?

  1. Apr 7, 2012 #1
    Okay, so I have this equation:

    F = F1 + F2 - dF1F2

    Anyways, I have the uncertainties for F1 and F2, how would I go about getting the uncertainty for F?

    Do I just simply add the uncertainties or do I use the formula deltaF1/F1 +deltaF2/F2 = deltaF/F?

    Thanks for your help.
  2. jcsd
  3. Apr 7, 2012 #2


    User Avatar

    Staff: Mentor

    First find the uncertainty in the product term using the appropriate rule for multiplication then treat that partial result as a new value with its own uncertainty. Use the rule for addition/subtraction when you sum the remaining values.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook