Gravitational Potential Energy of a tower

1. Mar 20, 2008

E=mgh

how to find the gravitational potential energy if the mass is not given
only height is given

E.G
A man decides to cimb an office tower. If the floors are 3.8 m apart, how much gravitational potential energy would the man have relative to the ground floor if he made it to 5th floor??

2. Mar 20, 2008

how to find the gravitational potential energy if the mass is not given
only height is given

E.G
A man decides to cimb an office tower. If the floors are 3.8 m apart, how much gravitational potential energy would the man have relative to the ground floor if he made it to 5th floor??

3. Mar 20, 2008

Mentz114

You only need to find the ratio of the PE on the ground and five floors up. The mass cancels out.

Last edited by a moderator: Mar 20, 2008
4. Mar 20, 2008

dude i need da answer too :(
In da book the answer is wrong

5. Mar 20, 2008

Mentz114

What answer is that ?

Use the formula you give in your first title, and calculate E for d and d+(extra height).

Last edited: Mar 20, 2008
6. Mar 20, 2008