A 85-kg sprinter accelerates from rest to a speed of 100 ms, Physics

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A 85-kg sprinter accelerates from rest to a speed of 100 ms

a 85-kg sprinter accelerates from rest to a speed of 10.0 m/s in a 5.0 s.

(a) calculate the mechanical work done by the sprinter during this time.

(b) calculate the average power the sprinter must generate.

(c) if the sprinter converts food energy to mechanical energy with an effiency of 25%, at what rate is he burning calories?

(d)what happens to the other 75% of the food energy being used?

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Physics: A 85-kg sprinter accelerates from rest to a speed of 100 ms

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