energy is the energy of motion."
when an object is moving, it has energy. This form of energy
is due to its motion.An object which has motion - whether
it be vertical or horizontal motion - has kinetic energy.
There are many forms of kinetic energy - vibrational (the
energy due to vibrational motion), rotational (the energy
due to rotational motion), and translational (the energy
due to motion from one location to another). To keep matters
simple, we will focus upon translational kinetic energy.
The amount of translational kinetic energy (from here on,
the phrase kinetic energy will refer to translational kinetic
energy) which an object has depends upon two variables:
the mass (m) of the object and the speed (v) of the object.
The following equation is used to represent the kinetic
energy (KE) of an object:
m = mass of object
v = speed of object
This equation reveals that the kinetic energy
of an object is directly proportional to the square of its
speed. That means that for a twofold increase in speed,
the kinetic energy will increase by a factor of four; for
a threefold increase in speed, the kinetic energy will increase
by a factor of nine; and for a fourfold increase in speed,
the kinetic energy will increase by a factor of sixteen.
The kinetic energy is dependent upon the square of the speed.
As it is often said, an equation is not merely a recipe
for algebraic problem-solving, but also a guide to thinking
about the relationship between quantities.
is the movement of electrical charges. Everything is made
of tiny particles called atoms. Atoms are made of even smaller
particles called electrons, protons, and neutrons. Applying
a force can make some of the electrons move. Electrical charges
moving through a wire is called electricity. Lightning is
another example of electrical energy.
Radiant Energy is electromagnetic
energy that travels in transverse waves. Radiant energy includes
visible light, x-rays, gamma rays and radio waves. Light is
one type of radiant energy. Solar energy is an example of
Thermal Energy, or heat, is the
internal energy in substances – the vibration and movement
of the atoms and molecules within substances. Geothermal energy
is an example of thermal energy.
Motion Energy is the movement
of objects and substances from one place to another. Objects
and substances move when a force is applied according to Newton’s
Laws of Motion. Wind is an example of motion energy.
Sound is the movement of energy
through substances in longitudinal (compression/rarefaction)
waves. Sound is produced when a force causes an object or
substance to vibrate––the energy is transferred through the
substance in a wave.
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