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Determining the mass of a beam and using percent uncertainty

  1. Dec 3, 2014 #1
    1. The problem statement, all variables and given/known data
    An astronaut exerts a 110-N force pushing a beam into place on the International Space Station. The beam accelerates at 0.40m/s2 .
    What is the percent uncertainty in your answer? The uncertainty of the force is 10 N and the uncertainty of the acceleration is 0.01 m/s2.

    2. Relevant equations
    F=m*a

    3. The attempt at a solution
    I plugged into the equation and found the mass to be 275kg. I get lost after that because I need to find the percent uncertainty.
     
  2. jcsd
  3. Dec 3, 2014 #2

    mfb

    User Avatar
    2016 Award

    Staff: Mentor

    There is a standard formula how to combine relative uncertainties from two different sources, and I am sure your textbook has it. Just plug in numbers. You can also use a formula for absolute uncertainties, but that needs more steps.
     
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