For the car and paperclips

Let 1 unit of force correspond to the weight of 1 small paperclip.  On this scale the weight of a large paperclip is 3 units of force.

If the paperclip is on the car, its weight is balanced by the upward force exerted by the table and it has no direct effect on the car's acceleration.  If it is suspended, then its weight contributes to the accelerating force.

You should have obtained a count and a distance from rest for each trial, and on each trial there will be some number of force units suspended from the thread (1 unit for every small, 3 units for every large clip).  Report in the first line the number of clips, the count and the distance from rest, separated by commas, for your first trial.  Report subsequent trials in susequent lines.  After reporting the data for all your trials, give a brief explanation of your setup and how the trials were conducted.  Include also the information about how many of your counts take how many seconds.

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Determine the acceleration for each trial.  You may use the 'count' as your unit of time, or if you prefer you can convert your counts to seconds and use seconds as your time unit.  In each line below list the number of suspended force units and your acceleration.  After reporting your results, give in the next line the units and your explanation of how your results were obtained.

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Sketch a graph of acceleration vs. number of force units, and describe your graph.  Fit a straight line to your graph and determine its slope.  Describe how the trend of your data either indicates a good straight-line fit, or how it deviates from a straight line.

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