By general agreement, it is conventional to think of ground, or earth, as being at zero volts.
Potential energy depends upon the datum(initial condition ) chosen.If we take ground as datum potential energy is zero
Voltage is the potential difference to the ground. By convention, ground potential is zero volt.The above answer is incorrect. 'Voltage', by definition, is potential difference. It has nothing to do with being measured with respect to ground -in fact potential difference (voltage) cannot be measured with respect to anything.
Zero
No , it won't have potential energy. Potential energy is due to height.
It is higher from ground thus it contain potential energy.
The potential energy of the box on the ground is considered to be zero. Potential energy is the energy that is stored within an object due to its position or state. Since the box is already at ground level, it does not possess any potential energy.
When a ball is about to fall it has potential energy because of its height.When a ball is about to hit the ground it still has some potential energy since it has't hit the ground yet, but much less than it had when it started falling.
a bird on the ground
The potential energy, expressed in joules, is 196 times its height above ground, expressed in meters.
Double the first potential energy.
When an object is lifted from the ground, it has potential energy because of it's position.
The higher above the ground an object is, the greater its potential energy.