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In this investigation, we studied the motion of a projectile and investigated the hypothesis
that horizontal motion is independent of vertical velocity.
We measured the initial
velocities of a ball, shooting it at a short and a long range setting.
Measurements were
taken of the horizontal and vertical distances traveled by the ball.
By comparing a the
projectile motion of a theoretical ball shot at 30 degrees to the recorded values of a ball
shot at this angle, we were able to show that factors such as air resistance make the actual
ball perform differently than would be calculated.
The ball actually traveled an average
of 1.812 meters, whereas our predicted range was an average of 1.914 meters (average of
part 1 and part 2 calculated range).
Although the predicted value did not agree exactly
with the actual range, the experiment did show that a calculated value can be used as a
pretty accurate guide to predict where a projectile will drop and the time it will take to do
so.
Overall, the experiment does support the widely accepted principles that projectile
motion can be predicted and that it can be broken into horizontal and vertical
components.
The timeofflights for Part 1 did not change with initial velocity.
The short range
average time was 0.459 +/ 0.001 seconds, compared to the medium range flight time of .
458 +/ 0.001 seconds.
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 Fall '08
 WALKER
 Physics

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