Sources of error for lab

Hey! So I need help coming up with a source error for this lab I did. We rolled a car down a wooden board and timed the cart rolling down at different distances on the board. So far I have errors dealing with friction, the stopwatches, and the wooden board (kept on falling). I need one more (cant be human error) Have any ideas other than what I have? Thanks a zillion

asked by McHelpme
  1. It is hard for us to know how the lab was accomplished. Was the ramp straight, or bowed?

    posted by bobpursley
  2. It was straight. It was a straight wooden board. We held up the wooden board with different objects, to increase the angle of inclination/height, and then dropped the cart down the wooden board. (Does that help)

    posted by McHelpme
  3. What about the measurement of the inclination angle?

    posted by bobpursley
  4. how would that be an error?

    posted by McHelpme
  5. when doing a chromotography lab what are the sorces of error

    posted by Anonymous

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