Investigation 2 Lab Report

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School

East Carolina University *

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1161

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Physics

Date

Dec 6, 2023

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docx

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Uploaded by CountRookPerson1636

8747 Physics Lab Draft Report 2 Physics 1251 Section 1: The overall experiment conducted was to answer the guiding question “Does a ball rolling on an incline have the same acceleration on the way up as it does on the way down?” In order to determine if this is true, there are key scientific concepts that need to be addressed. Position, time, velocity, and acceleration. Velocity can be determined by taking the distance traveled, and dividing it by the time. Whereas acceleration is the velocity measured divided by the time. These scientific concepts directly correlate to the guiding question, “Does a ball rolling on an incline have the same acceleration on the way up as it does on the way down?” because, evidently, the acceleration can be found, by determining the velocity. And in order to determine the velocity of a given object, the distance and time would need to be found and divided by each other to gather the velocity of the marble, and with that given information, divided by the time once more, it would determine the acceleration of the marble. Section 2: To investigate whether a ball exhibits identical acceleration when rolling on an incline in both the uphill and downhill directions, we conducted a comprehensive experiment. Using a marble, we rolled it across a ramp for a distance of 20 cm and allowed it to return downhill. This investigation was conducted at two distinct incline angles: 2° and 5°, ensuring a thorough examination of the phenomenon. To carry out the experiment meticulously, we positioned a motion camera to capture the entire ramp, ensuring that the marble's passage over the 20 cm mark and its change in direction as it rolled back down were well within the camera's frame. We took measures to minimize potential errors by recalibrating the camera angle whenever the ramp's incline was adjusted, ensuring precise alignment for accurate tracking of the marble's movement over time. Our experiment was conducted twice, once at each incline angle, to facilitate a direct comparison of the marble's acceleration when moving uphill and downhill. By recording time in milliseconds (ms) and distance in centimeters (cm) and adhering to rigorous camera alignment procedures, we aimed to determine whether the marble's acceleration remained consistent in both directions of motion.

8747 Physics Lab Draft Report 2 Physics 1251 Section 3: Figure 1: Accelerations of a Small and Large Incline Given the data above, the small incline (2°)accelerations are statistically the same if you were to consider absolute values for the deceleration part. With the combined uncertainties of the small incline, it would be 0.70, which overlaps with the acceleration of the acceleration and deceleration portions. (8.12+.7 = 8.82 > 8.6) Thus justifying that the small incline experiment yielded a statistically similar acceleration going up the incline, and coming back down. Unfortunately for the larger incline (5°), it was not statistically the same, having the combined uncertainties being 2.59, and 16.8 + 2.59 = 19.39 < 24. There was a dramatic skew in the data when confirming the statistics from this experiment to the experiment that the other groups performed. Many groups that were visited had a lot of different data and valid points. Although there was no majority whether or not the acceleration going up is the same as going down, there was an even split with plenty of evidence backing the groups claims. One of the groups addressed great means of reduction of error that coincided perfectly with the experiment performed in this report, as well as some other reductions that could be used in the future. The group similarly calibrated the camera with the ruler in order to ensure the ramp's incline was aligned with the camera to gather accurate and precise data. A means of reduction that the group included in their presentation was wiping down the track prior to rolling the marble to reduce any debris that may cause the marble a discrepancy in speed when traveling across the ramp. Unfortunately, all groups did not do multiple trials of the experiment, and only did one of the inclines to determine whether or not a marble has the same acceleration going up as it does going down. One group's data was significantly skewed unbeknownst to the reason behind the major skew, the data represented was approximately 500 for their means of acceleration, which was a major difference between the results presented in this paper. Some possible sources of error that could have acquainted to the acceleration not being the same is the angle being too high, or the marble not getting pushed hard enough, or vice versa; too slow. Overall, within this experiment, the small incline of 2° had the same acceleration going up as it did going down.

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