how fast is the runner if it reach the 100 mark in just nine seconds in a race
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Answer:
about 13.2m/s.
Explanation:
For a human to run 100m in under nine seconds, this would require maximum velocity to reach about 13.2m/s. Such velocity would require, for example, step length to be 2.85m and step frequency 4.63Hz – just “modest” increases from Usain Bolt's values.
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