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15. Using energy considerations, calculate the average force a 60.0-kg sprinter exerts backward on the track...

15. Using energy considerations, calculate the average force a 60.0-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.


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