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Calculate the change in potential energ of a 85.8 kg man when he takes an elevator from the first floor to 46th floor, if the istance between floors...

Calculate the change in potential energy of a 85.8 kg man when he takes an elevator from the first floor to 46th floor, if the distance between floors is 4.53 m.
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The change of potential energy of man... View the full answer

7 comments
  • how com Yf be 46*4.53..?
    • flynn2179
    • Apr 04, 2018 at 9:50am
  • each floor has a height of 4.53m, and final position is on the floor n = 46, therefore, Yf = n * 4.53m = 46 * 4.53m = 208m
    • Ruben08
    • Apr 04, 2018 at 9:54am
  • Please correct my concept: if you are on the first floor you take the height of a ground floor( which is below you), so if you are on the 46th floor, you have to take the height of 45 floors under you , I have taken foot as the reference point.
    • flynn2179
    • Apr 04, 2018 at 9:59am
  • This answer is correct. Thanks!
    • albert1007
    • Apr 04, 2018 at 10:02am
  • each floor has a height of 4.53m, and final position is on the floor n = 46, therefore, Yf = n * 4.53m = 46 * 4.53m = 208m Everything depends on the reference system, it is true that the change occurs in 45 floors, but I take the lowest part of the building as a reference system, therefore the man is initially on 1 floor of the floor, has an initial potential energy , then it reaches the 46th floor where it has a final potential energy. As the potential energy change is requested, subtraction is done
    • Ruben08
    • Apr 04, 2018 at 10:07am
  • You're welcome, a pleasure to help you
    • Ruben08
    • Apr 04, 2018 at 10:08am
  • Thanks you Ruben08
    • flynn2179
    • Apr 04, 2018 at 10:32am

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Other Answers

Here, Mass of the man is 85.8 kg g= 9.8 m/s 2 The man is standing on the first floor, initial elevation... View the full answer

3 comments
  • Do post immediately if have any question
    • flynn2179
    • Apr 04, 2018 at 9:43am
  • It tells me that the answer is incorrect.
    • albert1007
    • Apr 04, 2018 at 9:58am
  • Dear student , may be the concept I have used is wrong and Ruben08 is right, Use his concept. Thank You
    • flynn2179
    • Apr 04, 2018 at 10:00am

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