Model Airplane Nationals

Centripetal Acceleration?
The National Aeronautics and Space Administration (NASA) studies the physiological effects of large accelerations on astronauts. Some of these studies use a machine known as a centrifuge. This machine consists of a long arm, to one end of which is attached a chamber in which the astronaut sits. The other end of the arm is connected to an axis about which the arm and chamber can be rotated. The astronaut moves on a circular path, much like a model airplane flying in a circle on a guideline. The chamber is located 15 m from the center of the circle. At what speed must the chamber move so that an astronaut is subjected to 8.9 times the acceleration due to gravity?
Using g = 9.80665 m/s², the desired centripetal acceleration for the astronaut is 8.9g = 87.2792 m/s²
The magnitude of a = ω²r, so ω = sqrt(a/r) = sqrt(87.2792 m/s² / 15 m) = 2.412 radians/s, or 2.4 radians/s with the correct number of significant digits.
If you want your answer in linear velocity of the chamber, v:
ω = v/r, so v = rω = 15 m * 2.412 radians/s = 36.1827 m/s, or v = 36 m/s with the correct number of significant digits.
|
|
Hard Hat Harry’s: Real Life Airplanes for Kids $7.02 Join “Hard Hat Harry” – the loveable genie – and his young friends, Jimmy and Katie, for a journey into the exciting world of airplanes and jets! Harry magically appears in full flight gear and takes everyone on a fascinating adventure! You’ll see spectacular footage of jets soaring through the sky, ground control directing air traffic and much more! You’ll even go inside an airplane cockpit just … |
|
|
Streamlight 78014 Ultra Stinger Xenon Rechargeable Flashlight with Charger, Anodized Black $91.95 The Streamlight UltraStinger Flashlight is a high-intensity, super-bright, rechargeable flashlight with a variable spot-to-flood beam and a xenon-halogen bulb that will last up to 30 hours. Featuring a handy, head-mounted, push-button switch for single-handed operation and durable, corrosion-resistant materials, the UltraStinger Flashlight is ideal for use at home or at work. UltraStinger Flashlig… |
|
|
Creativity For Kids Stunt Squadron $17.95 Customize this fleet of 5 durable foam planes with color-in stickers, markers, and metallic accents. The soft but tough foam bodies are easy to assemble and perfect for indoor or outdoor use. Wingspan measures 7″. For ages 5 and up…. |
|
|
B727-200 National 1/200 $29.60 Pre-decorated plastic snap-fit display models. Models are printed, not decaled, and include plastic stand…. |
|
|
Gemini Jets National DC-8-71F 1:400 Scale $30.95 This is a 1:400 scale die-cast model airplane from Gemini Jets of the DC-8-71F aircraft in the colors of National Airlines with registration N872SJ… |
|
|
Pro Pilot 99 $25.99 … |