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The 100 m dash can be run by the best sprinters in 10.0 s. A 68 kg sprinter accelerates uniformly for the first 55 m

The 100 m dash can be run by the best sprinters in 10.0 s. A 68 kg sprinter accelerates uniformly for the first 55 m to reach top speed, which he maintains for the remainder of the race. What is the average horizontal component of force exerted on his feet by the ground during acceleration? Round your answer to the nearest ones place.

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