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III. Experiment Method
III. Experiment Method
1. Experimental Equipment
1. Experimental Equipment
5g weight * 1
Ruler (from Tool Box) * 1
Webcam (from Tool Box) * 1
2. Experimental Procedure
2. Experimental Procedure
1. Check the Equipment: Verify that all equipment listed above is present and functional.
2. Set up the Free Fall Experiment: Record videos of the free fall from four different heights: 0.27 m, 0.25 m, 0.23 m, and 0.20 m using the webcam, refer to the “Video Recording” section.
3. Perform Video Analysis: Use ImageJ software to analyze the recorded videos. For guidance, refer to the “ImageJ Analysis” section, which outlines how to track the object's motion and extract relevant data.
4. Data Analysis:
For the 0.25 m and 0.27 m height experiments, plot two graphs:
A graph showing the relationship between the height y and the time t for the free-falling object.
A graph showing the relationship between the height y and t².
From the slope of the y vs. t² graph, calculate the acceleration due to gravity g.
5. Compare Results with Theoretical Value: Compare the calculated g value from the experiment with the theoretical value of g=9.8 m/s². Compute the percentage error to assess the accuracy of the experiment. For guidance, refer to the “Data Analysis” section for detailed error analysis.
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