2. Unit 2 – NonLinear Equations
Lesson 2 – Quadratic Graphs and Equations
SlowMotion Tennis Ted White
This picture was produced in a dark
room, with a strobe light and a camera
that was capable of taking long exposure
shots (by keeping its shutter open longer).
The parabolic shapes brilliantly
demonstrate the relative time that it takes
for the ball to travel throughout the various
points of the image. At the very top of
the parabola, the tennis ball images appear
very close together, therefore indicating
that the ball moved at a slower velocity.
Conversely, near the bottom of the
parabolas, the distances between the
images of the ball grow larger, therefore
indicating that the ball moved more space
per time interval as it descended toward
the racket. This slowmotion tennis
picture helps one more easily visualize the
properties of parabolic motion, as defined
by Earth's gravitational force.
http://science.jburroughs.org/mschober/photo
s/photocontest06/photocontest06
Pages/Image12.html
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