#### Jeff Regester Chris Bernhardt Physics Chemistry Jason Cheek Melinda Graham Mathematics Mathematics Tim Martin Earth Science Eric Shilling Mathematics Greensboro Day School Hooke’s Law Orbital Motion Reduced-Gravity Flight Experiment.

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Jeff Regester Chris Bernhardt Physics Chemistry Jason Cheek Melinda Graham Mathematics Mathematics Tim Martin Earth Science Eric Shilling Mathematics Greensboro Day School Hooke’s Law Orbital Motion Reduced-Gravity Flight Experiment.

Jeff Regester
Chris Bernhardt
Physics
Chemistry
Jason Cheek
Melinda Graham
Mathematics
Mathematics
Tim Martin
Earth Science
Eric Shilling
Mathematics
Greensboro Day School
Hooke’s Law Orbital Motion
Reduced-Gravity Flight Experiment
What Happens When...?
Isaac Newton’s First Law of Motion: an object at
rest will stay at rest, and an object in motion
will stay in motion in a straight line with a
constant speed...
INERTIA
Centripetal Force
So, if something moves in a circle, there must be
a reason.
centripetal = centrum + petere (N. Latin)
= center + to seek
What keeps each of these things orbiting?
Planets around a star...
Moons around a planet...
Electrons around a nucleus...
Tennis ball around hand...
And what shapes are these orbits?
In our experiment...
Hooke’s Law
F=k·x
F = force
x = stretch of the spring
k = spring constant
Hooke’s Law Orbits
Two masses, connected by a spring, will be set spinning by a turntable
apparatus. When released, the masses will (in general) oscillate inward
and outward as they also orbit the system center of mass.
http://www.youtube.com/watch?v=aK6sYih6vfI
The apparatus under construction
Ellington Field
Fiona, our wonderful NASA mentor!
Tours
Final Preparations
Test Readiness Review (TRR)
Flight Day!
FLIGHT 1 ACCELEROMETER DATA
thirty 0-g parabolas...
two Mars parabolas
two Moon parabolas
Parabola 8
0
1040
1050
1060
1070
1080
1090
-0.2
-0.4
apparent gravity (g's)
-0.6
-0.8
-1
-1.2
-1.4
-1.6
-1.8
-2
time (sec)
1100
1110
1120
For more info...
Go to the HLOM project website for...
– photos and video
– raw and analyzed data
– numerical models
– articles, papers and classroom activities as they
are written
http://academic.greensboroday.org/~regesterj
/data/rgo-HLOM/
Who will get sick on the 0g flight?
Results of a student poll prior to flight, as a histogram.