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.
Examples of storing gravitational potential energy include: Water in a raised dam A boulder at the top of a cliff A book on a high shelf A person at the top of a staircase.
An example of potential energy: a cocked trebuchet
Turbines are placed at the bottom of a hydroelectric dam to take advantage of the pressure created by the water stored in the reservoir above. The height difference between the water level in the reservoir and the turbines generates potential energy, which is converted into kinetic energy as the water flows through the turbines. Placing the turbines at the bottom allows for maximum energy extraction from the falling water.
The amount of energy obtained from a hydroelectric source is determined by the flow rate of water and the vertical distance (or head) that the water falls from the top of the dam to the turbines at the bottom. These two factors influence the potential energy that can be converted into electrical energy.
Potential energy is "stored energy" because of its position in space. For example, a car parked at the top of a hill, or the water behind a dam.
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.
Examples of storing gravitational potential energy include: Water in a raised dam A boulder at the top of a cliff A book on a high shelf A person at the top of a staircase.
An example of potential energy: a cocked trebuchet
Turbines are placed at the bottom of a hydroelectric dam to take advantage of the pressure created by the water stored in the reservoir above. The height difference between the water level in the reservoir and the turbines generates potential energy, which is converted into kinetic energy as the water flows through the turbines. Placing the turbines at the bottom allows for maximum energy extraction from the falling water.
because the water pressure on the damn is much higher on the bottom of it than the top.
The pressure of the water (the weight) is greater at the bottom, due to the depth of the water. As the pressure is less near the top, the top of the dam wall doesn't need to be as thick as the bottom of the dam wall.
The pressure of the water against the top of the dam wall, is much less than the pressure exerted against the bottom of the dam wall. The width of a dam wall increases to compensate for the increased water pressures at the lower level.
Of course. That's exactly what happens when the water at the top of the lake behind the dam pours down through the pipes and turns millstones or generators on the way down.
Because the pressure of the water is a lot stronger at the bottom of the water and a lot less strong closer to the surface of the water
The amount of energy obtained from a hydroelectric source is determined by the flow rate of water and the vertical distance (or head) that the water falls from the top of the dam to the turbines at the bottom. These two factors influence the potential energy that can be converted into electrical energy.
(This assumes that the water is fallingverticallywith nohorizontalmovement.) The speed of the water at the top of the dam is 0. We can find the speed of the water at the bottom of the dam with the equation v2= v02+ 2ax, where v0is 0, a is 9.81 m/s2(accelerationdue to gravity), and x is 30.v2= 2(9.81)(30) = 588.6v = 24.26 m/sThekineticenergyis then (1/2)mv2= (1/2)(5)(24.26)2which is about 1472 Joules.