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The first human-powered airplane to cross the English Channel was the Gossamer Albatross. A person turned the propeller by means of a bicycle pedaling mechanism. In order to keep the plane flying, he had to deliver 0.3 horse power (hp) to drive the mechanism throughout the duration of the 2 hours 49 mins flight. Human muscles have an efficiency of about 20%; that is 20% of the energy released in your body goes into doing mechanical work. a. What total energy did the pilot use during this flight? (1.13x10° J) b. A Big Mac hamburger provides about 500 kcal. How many such hamburgers would the pilot has to eat to obtain enough energy for the flight across the channel? (5.4) Note: 1 hp = 746 W, 1 cal = 4.2 J

The first human-powered airplane to cross the English Channel was the Gossamer Albatross. A person turned the propeller by means of a bicycle pedaling mechanism. In order to keep the plane flying, he had to deliver 0.3 horse power (hp) to drive the mechanism throughout the duration of the 2 hours 49 mins flight. Human muscles have an efficiency of about 20%; that is 20% of the energy released in your body goes into doing mechanical work. a. What total energy did the pilot use during this flight? (1.13x10° J) b. A Big Mac hamburger provides about 500 kcal. How many such hamburgers would the pilot has to eat to obtain enough energy for the flight across the channel? (5.4) Note: 1 hp = 746 W, 1 cal = 4.2 J

College Physics
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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The first human-powered airplane to cross the English Channel was the Gossamer Albatross. A person turned the propeller by means of a bicycle pedaling mechanism. In order to keep the plane flying, he had to deliver 0.3 horse power (hp) to drive the mechanism throughout the duration of the 2 hours 49 mins flight. Human muscles have an efficiency of about 20%; that is 20% of the energy released in your body goes into doing mechanical work. a. What total energy did the pilot use during this flight? (1.13x10° J) b. A Big Mac hamburger provides about 500 kcal. How many such hamburgers would the pilot has to eat to obtain enough energy for the flight across the channel? (5.4) Note: 1 hp = 746 W, 1 cal = 4.2 J
Transcribed Image Text:The first human-powered airplane to cross the English Channel was the Gossamer Albatross. A person turned the propeller by means of a bicycle pedaling mechanism. In order to keep the plane flying, he had to deliver 0.3 horse power (hp) to drive the mechanism throughout the duration of the 2 hours 49 mins flight. Human muscles have an efficiency of about 20%; that is 20% of the energy released in your body goes into doing mechanical work. a. What total energy did the pilot use during this flight? (1.13x10° J) b. A Big Mac hamburger provides about 500 kcal. How many such hamburgers would the pilot has to eat to obtain enough energy for the flight across the channel? (5.4) Note: 1 hp = 746 W, 1 cal = 4.2 J
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