Question the best sprinters can run a 100 m in 100 s a 720, Ask an Expert

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Question: The best sprinters can run a 100 m in 10.0 s. A 72.0 kg sprinter accelerates uniformly for the first 53.0 m to reach top speed, which he maintains for the remaining 47.0 m.

Part A: What is the average horizontal component of force exerted on his feet by the ground during acceleration?

Part B: What is the speed of the sprinter over the last 47.0 m of the race (i.e., his top speed)?

Rework your solution from the beginning and check each step carefully.

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