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Kinetic
do windmills consist of kinetic and potential energy
The energy transformation in a wind up toy is potential energy --> Kinetic energy
Potential energy stored in a spring => kinetic energy of a toy
no -- the windmill converts the kinetic energy from wind to electrical energy. Gravitational energy is another term for potential energy.
Kinetic
Blowing wind has kinetic energy. This can be transformed into electrical energy using a turbine to transform the wind into rotational kinetic energy and a generator or alternator to convert the rotational kinetic energy to electrical energy. Water above a dam has potential energy from gravity and also from the weight of the water around it. Once it is moving or flowing down through the pipes it then has kinetic energy.
do windmills consist of kinetic and potential energy
None of the above ... Wind turbines convert the kinetic energy of wind into electrical energy.
The wind is an example of kinetic energy - the energy of motion. It is generally transferred as kinetic erergy to, say, a windmill where it could pump water and the kinetic energy is converted to potential energy.
The energy transformation in a wind up toy is potential energy --> Kinetic energy
No, it falls in the category of potential energy
wind resistance
The kinetic energy of the wind (moving mass of air) is (usually) converted into electric energy.
Answer 1Kinetic. Remember, kinetic energy is the energy of movement.Answer 2If one considers winding up for the pitch as analogous to winding up the spring on a crossbow, then you are converting kinetic energy (the motion produced by your arms) to potential "elastic" energy. Releasing the catch on the bow then converts the stored potential energy to the kinetic energy of the bolt as it flies away.Of course people are not crossbows, and the interplay of forces and motions is a bit more complex.Added:Answer two's analogy is flawed as the potential energy on the cross bow winding is not potential until the mechanism is stopped and locked. Until that point the energy is kinetic to potential. A pitcher winding up does not store potential energy as a locked in place cross bow bolt does.Added 2:Hence my statement that winding up a crossbow is *converting* kinetic energy to potential, while releasing the crossbow *converts* potential to kinetic energy.But as already noted, comparing winding up for a pitch to winding up a crossbow is probably not very accurate anyway.When a pitcher winds himself up for a pitch, he positions himself in such a way as to be able to convert the maximum amount of *chemical* energy into kinetic energy. At least, that's how I see it.
No, it is an example for kinetic energy as the wind is blowing.
Wind (air) may have a bit of gravitational potential energy, since it's up there and not on the ground. But the real, substantial energy of wind, and the energy we take out of it to turn things and generate electrical energy, is its kinetic energy. That's the reason that 'windmill farms' are built in places with steady wind. If there's no wind, then there's no kinetic energy available to be robbed from it.