Global Positioning System Reference
In-Depth Information
Physical formulas and mathematical language. It should also be noted that
physical formulas can be subject to mathematical transformations. Instead
of calculating every moment of the interaction, higher mathematics can
provide a formula to predict object states for every moment of interest.
By adding a dimension to each mass body, the time of a collision c can be
calculated and passed to an
Event
. The basic idea is to pass the information
of the collision at time t
c
to a timer waiting until t
c
occurs, and then re
an
Event
and inform other objects via a
Listener
to give them a chance
to react. Events and event listeners (cause and effect) can keep a system
running without any external interactions since the objects communicate
with each other.
Looking for the function of force in space F(x;y;z) in many dierent
contexts is one of the main tasks in physics. Physically speaking, the
gravity experiment takes place in a closed system concentrating on the
given quantities. By analyzing closed systems, laws of conservation can be
identified to predict results of the interactions. The earth-moon simulation
can also be solved with the assumption that the total momentum of the
system is conserved.
One of the most powerful concepts is the idea of energy. Energy in
physics is like money in economy. While money can be traded to acquire
things, energy is a theoretical value calculated in one scenario to be con-
sumed in another one. Nuclear power is transformed via heat to mechanical
motion to produce electricity. The total energy of a closed system is always
conserved and thus, equations can describe the transformations only inside
the system.
In the earth-moon scenario the potential energy of gravity is transformed
into kinetic energy of each mass body. By increasing the speed the body is
\lled" with energy, and this energy can then potentially be transformed
into another form of energy. Although energy is a mathematical construct,
it's an intuitive term in our language.
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