Using energy considerations, calculate the average force (in N) a 67.0 kg sprinter exerts backward on the track to accelerate from 2.00 to 8.00 m/s in a distance of 25.0 m, if he encounters a headwind that exerts an average force of 30.0 N against him.

Explanation:

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the part of the wave he is travelling on is the crest

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