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.
= m * g * h, where 'm' is the mass of an object, 'g' is the acceleration of gravity, 'h' is the height of the object. 1  Stored mechanical energy: The energy which is possessed by an object due to its stored energy of position. 2  E.g., rubber bands, springs. 3  Nuclear energy: Energy locked in the nucleus of the atom.