Gravitational Potential Energy of an elevator

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Homework Help Overview

The discussion revolves around calculating the change in gravitational potential energy for a man using an elevator, specifically focusing on the transition from the first to the 24th floor, with a given floor height.

Discussion Character

  • Exploratory, Mathematical reasoning, Assumption checking

Approaches and Questions Raised

  • Participants explore the correct application of the gravitational potential energy formula, questioning the height calculation based on the number of floors traveled.

Discussion Status

Some participants have provided feedback on the original poster's calculations, indicating that the equation appears correct while prompting a review of the height used in the calculation. There is an acknowledgment of a potential misunderstanding regarding the number of floors contributing to the height.

Contextual Notes

Participants are discussing the implications of the number of floors and the corresponding height in the context of gravitational potential energy calculations. There is a mention of a specific distance between floors, which is critical for the calculations.

BuBbLeS01
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[SOLVED] Gravitational Potential Energy

Homework Statement


Calculate the change in potential energy of a 77.2-kg man when he takes an elevator from the first floor to 24th floor, if the distance between floors is 4.05 m.


Homework Equations


Ug = mgy


The Attempt at a Solution


Ug = (77.2kg)*(9.81m/s^2)*(24*4.05m) = 73612.67N*m

What am I doing wrong??
 
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If the man travels from the first floor to the second floor how high is he?
 
4.05m
 
oh nevermind...
 
Your equation seems to be correct. I don't see any immediate problem. Just make sure you did not misread or mistype it.
 
BuBbLeS01 said:
oh nevermind...

Did you get it or just didn't like my hint?
 
LoL...I'm sorry...I got it...I was supposed to do 23*4.05m
 

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