![]() This results in a lower calculated value of g for this trial. This is probably because the Picket Fence was dropped at an angle that increased the distance, and therefore the measured time, between dark and transparent bands. In performing our calculations, it was noted the value of g in Trial 3 was unusually low compared to the other values. Additionally, our measurement was precise, with a small uncertainty of 0.01 m/s2. The acceleration of gravity measured in this lab verified that the accepted value of g is 9.81 m/s2 to within the uncertainty of the experiment. OOPS!! The data didn’t come out as expected! The conclusion discusses a reasonable and defensible way that this mistake was handled. Additionally, the accepted value lies within the uncertainty ± 0.01 m/s2 of the experiment. The value was measured to a precision of 0.1% and a percent error with the accepted value of 9.81 m/s2 of 0.0%. Arguably, this section could be combined with the Conclusion.įrom the data taken for this experiment, we determined that the acceleration due to gravity at the Earth’s surface is (9.81 ± 0.01)m/s2. The Results section briefly restates the important results found in the Data and Calculations section. Sample calculations are shown and clearly indicated. The precision was calculated as follows: 0.01 m / s 2 Precision = × 100% = 0.1% 9.81 m / s 2 ** The percent error was calculated as follows (9.81 m / s 2 ) − (9.81 m / s 2 ) % error = × 100% = 0.0% 9.81 m / s 2 Results: Results and Conclusion measure the success of the lab based on the Purpose section above. (9.814 m / s ) + (9.798 m / s ) + (9.810 m / s ) + (9.810 m / s ) + (9.820 m / s ) 2įrom the maximum, minimum and average values, we get our best answer and uncertainty for the acceleration due to gravity: Statements of uncertainty are shown in table form.Īcceleration due to gravity (g) Precision* Percent Error** Therefore, the minimum, average, and maximum values for the trials are: 2 The rest of the calculations were done in the lab notebook. Since that value is probably from an incorrectly performed trial, it has been rejected and the rest of the calculations ignore it. We expect that the Picket Fence was tilted and fell through the Photogate at an angle, resulting in a lower value of g (see the Conclusion section for more information). Inspecting the data shows that Trial 3 is significantly lower than the other five trials. Save the rest of the discussion for the Conclusion. ![]() ** Discussion in this section is limited to how the data was handled. This column was calculated from the data taken in the lab from the equation g = -2 C. This is the data taken from the plot of distance vs. Purpose of the table is Tables are a quick and clear way to show your data.Ĭ (m/s ) 4.907 4.899 4.796 4.905 4.905 4.910 The purpose of the following data is to determine the acceleration due to gravity at the Earth’s surface. time graphs are parabolic (see attached graph), and the velocity vs. While not necessary for our purposes, it is a nice touch. Data and Calculations: Below is a diagram of the apparatus for this experiment: Picket fenceĪ neatly handdrawn, labeled diagram of the apparatus is shown. Measure the acceleration due to gravity of a freely falling body near the Earth’s surface (g) using a Picket Fence and a Photogate. Boldface type helps the labels stand out from the text. Title: “Lab 2: Acceleration of Gravity” Purpose: Each section of the lab is labeled. Additionally, the purpose wasn’t copied verbatim from the lab manual. Purpose is clear and concise, so we can discuss the success of the experiment later. John Smith, with Steve Jones and Rob Brown June 21, 2013 Staple your papers together in the upper left-hand corner.ĭon’t forget your name, lab partners, date, class, and section number.
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