2. INTRODUCTION
The most basic of the sciences, physics, is
all around us every day. Have you ever
wondered that how roller coaster works,
why a Maglev train runs so fast, how do
space craft worked in Star Trek and how
Project Orion worked?
This presentation is going to tell you some
of that amazing things in which physics is
playing a very crucial role.
3. Roller Coaster
Roller Coasters use electromagnets to accelerate
the cars at a higher speeds than the older uphill
chain starts. They are also used in the braking
process which gradually slows the cars down by
increasing the strength of the magnets on the
track.
Roller Coasters have many functions that
involve electromagnets. They now use
magnetic propulsion, the attraction of magnetic
fields between the track and the bottom of the
train. It creates a quick acceleration, where as
before roller coasters relied on an uphill chain
start. Magnetic brakes have also been applied to
roller coasters so that magnets attract each other,
which gradually slows down the roller coaster.
4.
5. Electro Magnetism
Electromagnetism, or the electromagnetic force is
one of the four fundamental
interactions in nature, the other three being
the strong interaction, the weak interaction,
and gravitation . This concept is being used in
Maglev trains.
6. The train will be floating about 10mm above
the magnetic guiding track. The train will be
propelled to move by the guide way itself. Thus,
there is no need of any engine inside he train.
The train is propelled by the changing in
magnetic fields. As soon as the train starts to
move, the magnetic field changes sections by
switching method and thus the train is again
pulled forward. The whole guide way is run by
electromagnets so as to provide the magnetic
effect.
Thus the power needed for the whole process
is less when compared to a conventional electric
train. Amongst the power used, only a little is
used for the levitation process. But a higher
percentage of power is needed to overcome air
friction.
7.
8. PHOTOELECTRIC EFFECT
The photoelectric effect is the observation that
many metals emit electrons when light shines upon
them. Electrons emitted in this manner may be called
photoelectrons. This effect is used in spacecrafts.
The photoelectric effect will cause spacecraft exposed
to sunlight to develop a positive charge. This can be a
major problem, as other parts of the spacecraft in
shadow develop a negative charge from nearby
plasma, and the imbalance can discharge through
delicate electrical components. The static
charge created by the photoelectric effect is self-
limiting, though, because a more highly charged object
gives up its electrons less easily.
9.
10. NUCLEAR PULSE PROPULSION
Nuclear pulse propulsion or external
pulsed plasma propulsion, is a
theoretical method of spacecraft
propulsion that uses nuclear
explosions for thrust.
Project Orion was the first serious
attempt to design a nuclear pulse
rocket.
11. Project Orion was a study of
a spacecraft intended to be directly
propelled by a series of explosions
of atomic bombs behind the craft.
Early versions of this vehicle were
proposed to take off from the
ground with significant
associated nuclear fallout.
