Easy physics question? Need help????

Question

I can't figure this question out:

An object is dropped from the top of a building through the air (friction is present) to the ground below. How does its kinetic energy (KE) just before striking the ground compare to its gravitational potential energy at the top of the building?

I know that the potential energy at the top of the building = the KE at the bottom, so is this the answer? That the PE and the KE are the same?

Answer 1

Yes since it only has PE at the top it changes to all KE at the bottom

Answer 2

If it's so-called easy, than why can't you do it???

Answer 3

they r EQUAL not SAME

DO U SEE THAT THE PE is zero at the top and KE is zero at the bottom

KE is the form of energy which energy is used

while in PE the energy is stored

when ball is at the top it has KE stored

and PE is zero but as it goes down the KE IS USED UP AND IT IS CONVERTED INTO PE

[note;energy cannot be destroyed , it only changes form]

but due to friction some is used in overcoming it

so ultimately the KE BECOMES ZERO AT THE GROUND

but some is converted into PE [rest used in overcoming friction]

so only the values of KE and PE r equal not KE and PE itself

and the remaining energy in ball [PE] is used to bounce the ball again untill all of it is used

  

Answer 4

of course not, because there will be losses due to the friction  of air.it will be lesser than that of potential energy at the top.if friction is absent then the answer would be yes.