Always use your name for store id. It's most convenient. whenever you have some problems with product, they will ask you for id. So, its better to use real name. I often use some fictitious characters like Peter Parker, Ken Adams, etcetera while signing up on some timepass websites.
The gravitational potential energy near a planet is then negative, since gravity does positive work as the mass approaches. This negative potential is indicative of a bound state; once a mass is near a large body, it is trapped until something can provide enough energy to allow it to escape.
In physics, matter is considered to possess two kinds of energies ââ kinetic or potential energy. Kinetic energy is defined as the energy an object displays or possesses because of some kind of motion or action. Potential energy, on the other hand, is the energy an object possesses or displays by virtue of its state of rest. While potential energy is non-related to the environment of the object, kinetic energy is completely relative to the other moving or stationary objects in the environment. If an object is moving in an environment where other objects are moving too, the acceleration of the object will not be evident at all.