Question
A man is running around a circular track that is 200 m in circumference. An observer uses a stopwatch to record the runner's time at
A man is running around a circular track that is 200 m in circumference. An observer uses a stopwatch to record the runner's time at the end of each lap, obtaining the data in the following table.
Time (s) | Distance (m) |
---|---|
34 | 200 |
74 | 400 |
118 | 600 |
163 | 800 |
210 | 1000 |
287 | 1200 |
365 | 1400 |
444 | 1600 |
(a) What was the man's average speed (rate) between 74 s and 163 s? (Round your answer to two decimal places.) m/s (b) What was the man's average speed between 287 s and 444 s? (Round your answer to two decimal places.) m/s (c) Calculate the man's speed for each lap. Is he slowing down, speeding up, or neither? slowing down
speeding up
neither
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