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Problem 1 Problem 2 Problem 3 Problem 4 Problem 5 Problem 6 Problem 7 Problem 8 Problem 9 Problem 10 Problem 11 Problem 12 Problem 13 Problem 14 Problem 15 Problem 16 Problem 17 Problem 18 Problem 19 Problem 20 Problem 21 Problem 22 Problem 23 Problem 24 Problem 25 Problem 26 Problem 27 Problem 28 Problem 29 Problem 30 Problem 31 Problem 32 Problem 33 Problem 34 Problem 35 Problem 36 Problem 37 Problem 38 Problem 39 Problem 40 Problem 41 Problem 42 Problem 43 Problem 44 Problem 45 Problem 46 Problem 47 Problem 48 Problem 49 Problem 50 Problem 51 Problem 52 Problem 53 Problem 54 Problem 55 Problem 56 Problem 57 Problem 58 Problem 59 Problem 60 Problem 61 Problem 62 Problem 63 Problem 64 Problem 65 Problem 66 Problem 67 Problem 68 Problem 69 Problem 70 Problem 71 Problem 72 Problem 73 Problem 74 Problem 75 Problem 76 Problem 77 Problem 78 Problem 79 Problem 80 Problem 81 Problem 82 Problem 83 Problem 84 Problem 85 Problem 86 Problem 87 Problem 88 Problem 89 Problem 90 Problem 91 Problem 92 Problem 93 Problem 94 Problem 95 Problem 96 Problem 97 Problem 98 Problem 99 Problem 100 Problem 101 Problem 102 Problem 103 Problem 104 Problem 105 Problem 106

Problem 72 Hard Difficulty

$\bullet$ $\bullet$ Maximum sustainable human power. The maximum
sustainable mechanical power a human can produce is about
$\frac{1}{3}$ hp. How many food calories can a human burn up in an hour
by exercising at this rate? (Remember that only 20$\%$ of the
food energy used goes into mechanical energy.)

Answer

1070 $\mathrm{cal}$

Related Courses

Physics 101 Mechanics
College Physics

Chapter 7

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Discussion

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TJ

Taylor J.

January 9, 2021

For my answer I don’t have that option the options I have are 1100, 1500, 800, and 500.

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Video Transcript

So first, let's convert the power from horsepower to award so that it's more readable. So we'll have work done, which is power times, uh, amount of work. Now if we can work our power in what's will have 1/3 HP horsepower times 7 46 What's over one hp. This gets us to 49. What's now? If that's that's the total power. Then in an hour, the total energy will be w equals the power in wants times one hour. We convert that the seconds because we know that Watts is Jews for second. So we need to convert the hour to second TTO. Be just be consistent to get our energy and jewels. So using that, we see that we get 8.96 times. Enter five jewels. Now, if you want to convert that to food calories, what we do is the new equals equal in 96 times and bar Bye Jules tie ins. One food calorie divided by for 186 Jews. And that gives us 214 foot carries now, since 20% off these food calories goes to mechanical energy, so that means the number of food calories burned will be 20% off that number, which is, um so, yeah, the number of food calories burned will be 214 divided by you know 0.20 This is the food calorie. So the total food can agree with you. 1,100 food calories.

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College Physics

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