1. There is no such thing as absolute potential energy. There is only a difference in potential energy. Any "absolute" level is an arbitrary definition.
2. An object on the surface of the Earth has less energy than one that is higher up, but more than an object that is below the Earth's surface.
There is no absolute measure for potential energy. The calculation for potential energy depends on the chosen reference level. Quite often, the Earth's surface is chosen as the reference level - in this case, an object on the surface will have zero potential energy.
There is no absolute measure for potential energy. The calculation for potential energy depends on the chosen reference level. Quite often, the Earth's surface is chosen as the reference level - in this case, an object on the surface will have zero potential energy.
It may, or may not, be zero, depending on what you use as the reference level. The absolute amount of potential energy is physically meaningless; what matters is a difference in potential energy between two points.
That depends on what reference level you have chosen. If the (arbitrary) reference level you chose is Earth's surface, then anything on the Earth's surface has zero potential energy. If you choose some higher reference level, an object on Earth's surface has a negative potential energy. If you choose a lower reference level, an object on Earth's surface would have a positive potential energy.
The gravitational potential at Earth's surface is considered to be zero as it is the reference point from which gravitational potential energy is measured. Any object at Earth's surface has the potential to fall due to gravity, and this potential energy is typically defined as zero at Earth's surface for convenience in calculations.
Gravitational potential energy.
That is called gravitational potential energy.
gravitational energy is the same as potential and kinetic energy. When the ball is further from the surface of the earth it will have the most potential energy and when the ball gets closer to the surface of the earth that potential energy turns into kinetic energy because it is being used to move the ball towards the surface.
gravitational potential energy
Potential energy levels are often given as negative numbers. In the case of an electron, it's potential energy due to its location relative to the positively charged nucleus; the further away from the nucleus, the higher the energy level of the electron. So for convenience, physicists like to define potential energy levels at infinite distance (or separation) as "zero", and all others become negative. Since these forces (gravity, electromagnetic force) fall off with the square of distance, potential energies at finite (nonzero) distances aren't "negative infinity".
The weight and height of an object on Earth give it gravitational potential energy. This type of potential energy is based on the object's position in a gravitational field relative to the surface of the Earth.
Gravitational potential energy - it depends on the distance from the centre of gravity, so on Earth it depends on the height above the Earth's surface