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