A world-class sprinter accelerates to his maximum speed in, Ask an Expert

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A world-class sprinter accelerates to his maximum speed in 4s . He then maintains this speed for the remainder of a 100m race, finishing with a total time of 9.1s.

Part A What is the runner's average acceleration during the first 4s ?

Part B What is the average acceleration during the last 5.1 s?

Part C What is his average acceleration for the entire race?

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