A 57 kg woman athlete can generate a sustained specific power output of 5.0 W/kg. One training exercise is to push a heavy sled across the grass at a steady speed, which takes a horizontal pushing force of 155 N.
A 57 kg woman athlete can generate a sustained specific power output of 5.0 W/kg. One training exercise is to push a heavy sled across the grass at a steady speed, which takes a horizontal pushing force of 155 N.
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Transcribed Image Text:Part A
A 57 kg woman athlete can generate a sustained
specific power output of 5.0 W/kg. One training
exercise is to push a heavy sled across the grass at
a steady speed, which takes a horizontal pushing
force of 155 N.
What speed can she maintain for a sustained period of time?
Express your answer with the appropriate units.
µÁ
Value
Units
U =
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Part B
How much stored chemical energy will she "burn" in 10 minutes if her body is 25% efficient at converting chemical energy
into mechanical energy?
Express your answer with the appropriate units.
HÅ
E =
Value
Units
%3D
Submit
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Transcribed Image Text:•Part C
Calories are more familiar units than joules for thinking about the body's energy use. A useful conversion factor is
1 Cal = 4.2 kJ, where Cal įs the abbreviation for a food calorie. How many calories does the woman burn during the
10 min workout?
%3D
Express your answer in calories.
ΑΣφ
?
Cal
%3D
Submit
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