worksheet_01_08_flvs

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Feb 20, 2024

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Physics 400 Name: Data Collection—Table 1: Trials Distance (cm) Time (s) Average Speed (cm/s) (see question 2) Start 0 cm 0.0 1 100.0 cm (first section) 100.0 cm (first section) 1.75 57.1 2 200.0 cm (first two sections) 200.0 cm (first two sections) 3.58 54.6 3 300.0 cm (first three sections) 300.0 cm (first three sections) 5.69 47.4 4 400.0 cm (entire distance) 400.0 cm (entire distance) 7.93 44.6 Remember to include graphs A and B in this document or as separate attachments. Data Collection – Table 2:  Overall Average Speed (cm/s) from graph B 51.9 cm/s Questions: Answer using complete sentences and show your work for all calculations. 1. How does the shape of graph A compare to the shape of the graph B? The curve of best fit for graph A does not start at (0, 0) whereas Graph B does. Graph A is a power graph, and has a curve of best fit that matches up more with the data points. Graph B is a linear graph, and the line of best fit approximately represents the data points. Both graphs look similar, but Graph A has a curve and Graph B is a straight line. 2. For graph A, you can determine the average speed over any interval by using the slope formula, m=∆y/∆x. Using two adjacent points, determine the average speed over each interval you plotted. Be sure to show your work for all calculations. Include the average speeds in Table 1. (100 - 0) / (1.75 – 0)  100/1.75 = 57.1 cm/s (200-100) / (3.58 – 1.75)  100/1.83 = 54.6 cm /s (300-200) / (5.69 – 3.58)  100/2.11 = 47.4 cm /s (400-300) / (7.93 – 5.69)  100/2.24 = 44.6cm /s Unless Otherwise Noted All Content © 2022 Florida Virtual School. FlexPoint Education Cloud™ is a trademark of Florida Virtual School.

3. On graph B, find the slope of the line. That is the average speed for that graph. Record that in Table 2. 4. Why are the speed values in Table 1 and Table 2 called "average" instead of "instantaneous"? Average speed is measured as the entire duration whereas intsanteous would be if it were measured at specific intervals. 5. Refer to the data from trials 1-4. a. What happens to the average speed of the rolling ball as it moves from one 100.0 cm segment to the next 100.0 cm segment? The average speed values decreases. b. What causes the change in the ball’s speed as it moves from one 100.0 cm segment to the next 100.0 cm segment? Friction and air resistance causes the ball to slow down. While the ball was going down the ramp, it gained speed, but once it was on level ground, the speed steadily decreased. 6. How do the average speed values for the shorter intervals compare to the average speed value for Graph B? The average speed values for the shorter intervals decrease as time increases. For the first 100 cm distance, the average speed was the highest, at 57.1 cm/s. For the following sections, the average speed decreases. However, the slope for Graph B is the overall average speed of all the sections. Unless Otherwise Noted All Content © 2022 Florida Virtual School. FlexPoint Education Cloud™ is a trademark of Florida Virtual School. Graph A Graph B

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