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.