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Science · Drill 83

Science practice 83

5 questions ~9 min recommended
⏱ 00:00
Score
—

the Civil War housed one of the largest and wealthiest

Trial1
Average Time (s)Speed (ft/s)
39.412.7
39.912.5
38.712.9
39.312.7
Trial2
Average Time (s)Speed (ft/s)
52.69.5
55.4
51.39.0
9.7
53.39.4

345

PASSAGE V

Some students performed 3 studies to measure the average speed on a flat surface of a gas-powered golf cart. Each study was conducted on a fair day with no wind. A 500-foot long flat surface was measured, and the cart's travel time was measured from start to finish with a stopwatch. The cart was not modified in any way, the same driver was used each time, and the cart's fuel tank was filled before each trial.

Study 1

The students first drove the cart on a smooth asphalt road. One student drove the cart as the other student started the stopwatch. The student stopped the stopwatch as the cart crossed the 500-foot mark. The students calculated the results of three separate trials and averaged the results (see Table 1).

Study 2

The students repeated the procedure used in Study 1, except the cart was driven on the fairway (very short, well-groomed grass). The results are shown in Table 2.

Study 3

The students repeated the procedure used in Study 1, except they drove the cart through the rough (thick, long grass). The results are shown in Table 3.

1. The highest average speeds resulted from using which surface?

2. According to Table 1, the average speed for all three trials is:

3. According to Tables 1, 2, and 3:

4. According to the passage, which of the following was the independent variable in each of the studies?

5. During which of the following was the average travel time of the car the slowest?

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