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Homework Help: Percent error using acceleration and 1/mass

  1. Nov 11, 2011 #1
    I'm doing a lab where I had to use a cart and a pully, collecting data to compare the net force and the acceleration and again for acceleration vs mass. The acceleration vs mass graph was a curve, wich we then straightened out to give us a graph of acceleration vs 1/mass. I am wondering how i would go about to find my accepted value to use in my percent error equation. thank you ahead of time :)
  2. jcsd
  3. Nov 11, 2011 #2


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    Homework Helper

    Welcome to PF, mj.
    Since F = ma, a = F*1/m.
    Comparing that with good old y = mx + b, the slope on the a vs 1/m graph should be F.
    I trust you used the same force for all the data points. The force you used is your "accepted value" for the slope.
  4. Nov 11, 2011 #3
    YES ! i totally understand :) my slope is in Newtons so it would turn out to be F ! Thank you !
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