Forms of energy
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Transcript of Forms of energy
Kinetic Energy is energy that is in motion. Moving water and wind are good examples of kinetic energy. Electricity is also kinetic energy because even though you can't see it happen, electricity involves electrons moving in conductors.
Energy is measured in the amount of "work" it does.
Potential Energy is stored energy. Examples of potential energy are oil sitting in a barrel, or water in a lake in the mountains. This energy is referred to as potential energy, because if it were released, it would do a lot of work.
Energy can change
from one form to
another. A good
example is a Roller
Coaster. When it is on
its way up, it is using
kinetic energy since
the energy is in
motion. When it
reaches the top it has
potential (or stored)
energy. When it goes
down the hill it is
using kinetic energy
again.
There are other types of energy as well:
Mechanical Energy is the energy of motion that does the work. An example of mechanical energy is the wind as it turns a windmill.
Heat energy is energy that is pushed into motion by using heat. An example is a fire in your fireplace.
Chemical Energy is energy caused by chemical reactions. A good example of chemical energy is food when it is cooked.
Electrical Energy is when electricity creates motion, light or heat. An example of electrical energy is the electric coils on your stove.
Gravitational Energy is motion that is caused by gravity. An example of gravitational energy is water flowing down a waterfall.
Kinetic
(≥0), that of the motion of a body
Potential
A category comprising many forms in this list
Mechanical
The sum of (usually macroscopic) kinetic and potential energies
Mechanical wave
(≥0), a form of mechanical energy propagated by a material's oscillations
Chemical
that contained in molecules
Electric
that from electric fields
Magnetic
that from magnetic fields
Radiant
(≥0), that of electromagnetic radiation including light
Nuclear
that of binding nucleons to form the atomic nucleusonization that of binding an electron to its atom or molecule
Elastic
that of deformation of a material (or its container) exhibiting a restorative force
Gravitational
that from gravitational fields Intrinsic, the rest energy(≥0) that equivalent to an object's rest mass
Thermal
A microscopic, disordered equivalent of mechanical energy
Heat
an amount of thermal energy being transferred (in a given process) in the direction of decreasing temperature
Mechanical work
an amount of energy being transferred in a given process due to displacement in the direction of an applied force
Potential energies are often measured as positive
or negative depending on whether they are
greater or less than the energy of a specified base
state or configuration such as two interacting
bodies being infinitely far apart.
Wave energies (such as radiant or sound
energy), kinetic energy, and rest energy are each
greater than or equal to zero because they are
measured in comparison to a base state of zero
energy: "no wave", "no motion", and "no inertia",
respectively.
Mechanical energy (symbols EM or E) manifest in many forms, but can be broadly classified into potential energy (Ep, V, U or Φ) and kinetic energy (Ek or T). The term potential energy is a very general term, because it exists in all force fields, such as gravitation, electrostatic and magnetic fields. Potential energy refers to the energy any object gain due to its position in a force field.