Physics I Lab Manual 2011 53

# Physics I Lab Manual 2011 53 - W/g ω 2 r cm(d Create a new...

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EXPERIMENT 6. CENTRIPETAL FORCE because it does contribute to the weight that we measured using the force sensor in step 5 of the procedure. (a) Given that the plotted quantity 2 r is proportional to m , by what factor would m have to change to make the slope of the best-ﬁt line equal to 1? (b) From the measured mass m and the necessary correction factor found in the previous step, what mass would make the slope of the best ﬁt line equal to 1? What is the weight associated with this mass? Is it consistent with the measured weight W ? (c) Insert another column to hold the calculated value of the centripetal force that will use the corrected value for the mass taken from the weight. From the “Data” menu select “New Calculated Column ... ” and give the column an appropriate name (and short name) and then enter a formula of the form (
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Unformatted text preview: W/g ) ω 2 r cm . (d) Create a new plot of the measured centripetal force versus the corrected calculated centripetal force. Make sure to include error bars. Perform a linear ﬁt to this data and record the slope and y-intercept. What is the physical interpretation of the y-intercept if any? Based on the data, what can you conclude about the relationship F c = mω 2 r and why? Report In addition to the standard elements of a well written lab report described in the introduction to this manual, your report must include: 1. A discussion of the magnitude and likely origin of any systematic errors in your mea-surement. 2. The graph of F c versus mω 2 r for both the original mass value and the corrected mass value, with the best ﬁt lines. 43...
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