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A 74kg teacher (including the mass of his gear) hikes up a mountain! During his hike he experiences a 7N drag (and negligible friction impeding his motion). The distance of the path and the height of the mountain are shown. List the energy types at the initial and final time and whether work and loss (due to non-conservative forces) occur as well as the corresponding amounts of energy. 940m Noneo work? / = 6500m initial: ne • Wark reference level loss? Loss final: GPE : 10m /s How many kilocalories did he burn if his body does work with 20% efficiency? y= Vsand = 343 m/s Hint: Divide the work by the efficiency (in decimal form), then convert to kilocalories. kilocalories Kilocalories are typically just called "Calories" and an average person eats approximately 2000 kilocalories per day. %3D %3D

A 74kg teacher (including the mass of his gear) hikes up a mountain! During his hike he experiences a 7N drag (and negligible friction impeding his motion). The distance of the path and the height of the mountain are shown. List the energy types at the initial and final time and whether work and loss (due to non-conservative forces) occur as well as the corresponding amounts of energy. 940m Noneo work? / = 6500m initial: ne • Wark reference level loss? Loss final: GPE : 10m /s How many kilocalories did he burn if his body does work with 20% efficiency? y= Vsand = 343 m/s Hint: Divide the work by the efficiency (in decimal form), then convert to kilocalories. kilocalories Kilocalories are typically just called "Calories" and an average person eats approximately 2000 kilocalories per day. %3D %3D

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A 74kg teacher (including the mass of his gear) hikes up a mountain! During his hike he experiences a 7N drag (and negligible friction impeding his motion). The distance of the path and the height of the mountain are shown. List the energy types at the initial and final time and whether work and loss (due to non-conservative forces) occur as well as the corresponding amounts of energy. 940m Noneo work? / = 6500m initial: ne • Wark reference level loss? Loss final: GPE : 10m /s How many kilocalories did he burn if his body does work with 20% efficiency? y= Vsand = 343 m/s Hint: Divide the work by the efficiency (in decimal form), then convert to kilocalories. kilocalories Kilocalories are typically just called "Calories" and an average person eats approximately 2000 kilocalories per day. %3D %3D
Transcribed Image Text:A 74kg teacher (including the mass of his gear) hikes up a mountain! During his hike he experiences a 7N drag (and negligible friction impeding his motion). The distance of the path and the height of the mountain are shown. List the energy types at the initial and final time and whether work and loss (due to non-conservative forces) occur as well as the corresponding amounts of energy. 940m Noneo work? / = 6500m initial: ne • Wark reference level loss? Loss final: GPE : 10m /s How many kilocalories did he burn if his body does work with 20% efficiency? y= Vsand = 343 m/s Hint: Divide the work by the efficiency (in decimal form), then convert to kilocalories. kilocalories Kilocalories are typically just called "Calories" and an average person eats approximately 2000 kilocalories per day. %3D %3D
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