First, pebbles do not "flow" in a river, it is the river which flows.
The flowing of a river is caused by the conversion of potential energy (caused by the height difference in the water at the rivers current position and it mouth) into kinetic energy (the movement of flowing).
If the friction between the flow of the water and the pebble is high enough, some of the kinetic energy in the water can be passed to the pebble and this too will begin to move.
Flowing water has energy, motion, and moving matter. The type of energy that flowing water has is referred to as mechanical energy.
The steepness of the river's slope, the volume of water flowing in the river, and the type of rock or sediment being eroded are the three main factors that affect how much energy a river has to cause weathering, erosion, and deposition. The faster the flow, the more erosive the river can be.
Electric current is the rate at which electrons flow from one atom to another. It relates to a river in that the electrons which make up the current are always flowing in the same direction just like the current in a river.
The rock is likely a conglomerate, which is a type of sedimentary rock composed of rounded pebbles or larger grains cemented together by smaller particles. Conglomerates are formed through the process of sedimentary deposition and lithification. These rocks are often found in environments with high-energy river or coastal settings.
the current
Mechanical energy, if it is moving then it is kinetic mechanical energy. Or if it is at the top of a hill about to fall then it is potential mechanical energy.
Wind and flowing water can produce energy through the use of turbines. As wind blows or water flows, it turns the blades of a turbine, which then spins a generator to produce electricity. This type of energy generation is known as wind power in the case of wind energy and hydroelectric power in the case of flowing water.
Flowing water possesses mechanical energy because it has both kinetic energy (energy of motion) and potential energy (energy stored in its position). This energy can be harnessed and converted into useful work by mechanisms like water turbines or waterwheels.
Kinetic Energy!
In the river. Not over it. Not under it. And not next to it. In the river.It depends what type of fish and what river or lake. Usually for a river the best place is at a long, not too shallow, slow flowing area.
Kinetic energy is involved when a river moves sediment or erodes its banks.
A moving river has kinetic energy, which is the energy of motion. This energy comes from the water's movement and can be harnessed by devices like hydroelectric dams to generate electricity.