A(n) 82-kg sprinter accelerates from rest to a speed of 11.0 m/s in 4.1 s. (a) Calculate the mechanical work done by the sprinter during this time. J (b) Calculate the average power the sprinter must generate. W (c) If the sprinter converts food energy to mechanical energy with an efficiency of 25%, at what average rate is he burning Calories? Cal/s (d) What happens to the other 75% of the food energy being used
A(n) 82-kg sprinter accelerates from rest to a speed of 11.0 m/s in 4.1 s. (a) Calculate the mechanical work done by the sprinter during this time. J (b) Calculate the average power the sprinter must generate. W (c) If the sprinter converts food energy to mechanical energy with an efficiency of 25%, at what average rate is he burning Calories? Cal/s (d) What happens to the other 75% of the food energy being used
Chapter3: The First Law Of Thermodynamics
Section: Chapter Questions
Problem 1CQ: Consider these scenarios and state whether work is done by the system on the environment (SE) or by...
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A(n) 82-kg sprinter accelerates from rest to a speed of 11.0 m/s in 4.1 s.
(a) Calculate the mechanical work done by the sprinter during this time.
J
(b) Calculate the average power the sprinter must generate.
W
(c) If the sprinter converts food energy to mechanical energy with an efficiency of 25%, at what average rate is he burning Calories?
Cal/s
(d) What happens to the other 75% of the food energy being used
J
(b) Calculate the average power the sprinter must generate.
W
(c) If the sprinter converts food energy to mechanical energy with an efficiency of 25%, at what average rate is he burning Calories?
Cal/s
(d) What happens to the other 75% of the food energy being used
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