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Homework Help: Calculating Error Analysis

  1. Oct 14, 2007 #1
    1. The problem statement, all variables and given/known data

    What is the error in calculating the y-component of the force created by a hanging mass (m=432.23g) at an angle of 28º? Take g=9.81m/s^2)

    2. Relevant equations

    Fg = mg

    3. The attempt at a solution

    Fg = mg
    = (0.43223kg +/- 0.000005kg)(9.81m/s +/- 0.05m/s)
    = (0.43223 +/- 0.00115679%)(9.81 +/ 0.5097)
    = 4.2358 +/- 0.52359%
    = 4.2358N +/- 0.022079 N

    This was an example drawn on the board. How do you get from line 3-4, and 4-5? I do not know how to calculate 0.52359%, and when I try to calculate the 5th line, I do not get an answer of 0.022079. Please help! Thanks. :)
  2. jcsd
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