Gravitational Potential Energy of an elevator

[BuBbLeS01]

[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??

 

[Kurdt]

If the man travels from the first floor to the second floor how high is he?

 

[BuBbLeS01]

4.05m

 

[BuBbLeS01]

oh nevermind...

 

[Math Jeans]

Your equation seems to be correct. I don't see any immediate problem. Just make sure you did not misread or mistype it.

 

[Kurdt]

oh nevermind...

Did you get it or just didn't like my hint?

 

[BuBbLeS01]

LoL...I'm sorry...I got it...I was supposed to do 23*4.05m