Obviously - it has mass, and it is not at ground level.
Potential.
At the top of a waterfall, water has mainly potential energy, which is the energy stored in its position above ground level. This potential energy is converted into kinetic energy as the water falls downwards.
Water at the top of a hill gains gravitational potential energy by virtue of its elevated position above the ground. As the water is lifted to a higher altitude against gravity, work is done on it to increase its potential energy. This potential energy can be converted into kinetic energy as the water flows downhill.
The diver on top of a platform has potential energy due to their position above the ground or water. This potential energy can be converted into kinetic energy as the diver jumps or falls from the platform into the water.
The ball has the potential to move down the slope when released.
Yes.
An object that is stationary and at the top of something has "potential energy". (If you're getting into equations, it's PE = mgh, where PE = potential energy, m = mass of the object, g = the force of gravity, and h = the height of the object.)
Potential.
At the top of a waterfall, water has mainly potential energy, which is the energy stored in its position above ground level. This potential energy is converted into kinetic energy as the water falls downwards.
As water falls from the top of Niagara Falls, its gravitational potential energy is converted into kinetic energy. At the top, the water has maximum potential energy due to its height. As it descends, this potential energy decreases while its kinetic energy, associated with its speed, increases. By the time the water reaches the bottom, most of the potential energy has been transformed into kinetic energy, resulting in the rapid movement of the water.
Water at the top of a hill gains gravitational potential energy by virtue of its elevated position above the ground. As the water is lifted to a higher altitude against gravity, work is done on it to increase its potential energy. This potential energy can be converted into kinetic energy as the water flows downhill.
The diver on top of a platform has potential energy due to their position above the ground or water. This potential energy can be converted into kinetic energy as the diver jumps or falls from the platform into the water.
The water at the top of a waterfall has a great amount of potential energy.
The ball has the potential to move down the slope when released.
A skier at the top of a hill has potential energy due to their height above the ground. As they come down the hill, this potential energy is transformed into kinetic energy, allowing them to slide down the slope thanks to gravity. The skier's speed will increase as they descend due to the conversion of potential energy into kinetic energy.
The same as any other falling object. When it is at the top, it has gravitational potential energy; as it falls, that's converted to kinetic energy.
The ball has its maximum potential energy at the top of the incline, before it starts rolling down. This is because at that point, it is the farthest away from the ground and has the most potential to do work as it descends.