Question: A sprinter accelerates at the beginning of a 100-meter race and then tries to maintain maximum speed throughout the rest of the race. a. What

A sprinter accelerates at the beginning of a 100-meter race and then tries to maintain maximum speed throughout the rest of the race.
a. What external force is responsible for accelerating the runner at the beginning of the race? Explain carefully how this force is produced.
b. Once the runner reaches her maximum velocity, is it necessary to continue pushing against the track in order to maintain that velocity? Explain.

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