Principle: Law of Inertia (object in motion stays in motion
unless acted upon by an unbalanced force.
Three films that incorrectly illustrate the Law of Inertia:
1.
Wanted
2.
Star War Episode 6: Return of the Jedi
3.
Speed
THESIS: The film industry gains respect when a moment is
believable in our world as well as world that we have never experienced. Adhering
to the law of inertia in every sense would be believable, however, to the
thrill-seeking moviegoer, believable is not always impressive or entertaining
for the world introduced.
I.
Wanted: Curving Bullets
-Why?
The movie Wanted portrays a cult of assassins
possessing the mystical power of shooting curving bullets around objects and
infrastructures to kill their targets. However, curving a bullet is impossible.
Only a spherical object can be curved through a fluid due to Magnus forces
causing pressure differential. A bullet, a cylindrical object, does occur Magnus
forces through a fluid but produces a lift force rather than a curved motion.
Therefore,
the bullet in motion will stay in motion and not deviate from its path.
II.
Star Wars: Battle of the Death Star: X-wing twist
and turns in space
-Why?
During the Battle for Endor, the
X-Wing star fighters have the ability to perform agile maneuvers and acrobatic
tactics to avoid their enemies. The X-Wings contain four propulsion engines on
the rear of the fighter craft that are facing the same direction. With just
these four engines, propelling in the same direction, the fX-Wing cannot
perform such movement. Outer space is a vacuum, therefore, the fighter would
need propulsion engines directed in all directions allowing the fighter to
change paths.
In our universe, an object in
motion stays in motion. The fighter craft, given the standalone force of the
propulsion engines, would remain going straight unless acted upon by an
unbalanced force.
III.
Speed: Bus Jump
-Why?
In
the movie Speed, a bus jumps a gap
created in a highway. The opposite ends of the highway gap are relatively flat,
allowing for little to no vertical ascension.
When the bus begins to jumps the gap, the front end appears to have a
vertical lift before the rear end of the bus even leaves the paved
highway. This would not happen due to
the angle of the paved highway .The front of the bus would continue off of the
cliff and descend due to the acceleration of gravity.
Also, upon surviving the jump, the
shot of the rear end of the bus seemed to have been above the ground plane of
the highway. This contrasted with the first shot of the bus lifting off the
cliff, where the rear end of the bus descended the ultimate height of the
highway.
These two factors mentioned defy
the law of inertia because the action of the bus in the movie would call for
additional help to make it happen for the final shot.
CONCLUSION: For the
sake of story, laws of physics, such as the law of inertia could be deviated
from in an effort to impress. However, without careful planning, the deviation
could offend viewers because the sad attempt to trick the viewer could go
horribly wrong.
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