Originally Posted by CyberSEO

The kinetic energy needs only speed and mass. There is no gravity component in the formula. In case if you didn't learn it in the school: Kinetic energy - Wikipedia

There is such a thing as a gravitation potential energy which is a different thing: Gravitational energy - Wikipedia - it's not about a moving object. It's about an object which you hold in your hand staying at a roof and being to release. When the object will be dropped, the gravitation will turn its potential energy into a kinetic one. So longer path to the ground your object made, so higher kinetic energy it will have.

As another example, a bullet in your gun has a potential energy too and it does not need any gravitation to be turned ink the kinetic one. Just pull the trigger...

Man, these are basics of physics.