Gravitational Potential Energy of a tower

[paaraskohli]

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??

 

[paaraskohli]

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??

 

[Mentz114]

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

 

[paaraskohli]

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

 

[Mentz114]

What answer is that ?

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

 

[paaraskohli]

41 Joule

 

[Mentz114]

That's not a ratio, so my reading of the question is wrong. Sorry, can't help you.