BIO Hypergravity . At its Ames Research Center, NASA uses its large “20-G” centrifuge to test the effects of very large accelerations (“hypergravity”) on test pilots and astronauts. In this device, an arm 8.84 m long rotates about one end in a horizontal plane, and an astronaut is strapped in at the other end. Suppose that he is aligned along the centrifuge’s arm with his head at the outermost end. The maximum sustained acceleration to which humans are subjected in this device is typically 12.5g. (a) How fast must the astronaut’s head be moving to experience this maximum acceleration? (b) What is the difference between the acceleration of his head and feet if the astronaut is 2.00 m tall? (c) How fast in rpm (rev/min) is the arm turning to produce the maximum sustained acceleration?
BIO Hypergravity . At its Ames Research Center, NASA uses its large “20-G” centrifuge to test the effects of very large accelerations (“hypergravity”) on test pilots and astronauts. In this device, an arm 8.84 m long rotates about one end in a horizontal plane, and an astronaut is strapped in at the other end. Suppose that he is aligned along the centrifuge’s arm with his head at the outermost end. The maximum sustained acceleration to which humans are subjected in this device is typically 12.5g. (a) How fast must the astronaut’s head be moving to experience this maximum acceleration? (b) What is the difference between the acceleration of his head and feet if the astronaut is 2.00 m tall? (c) How fast in rpm (rev/min) is the arm turning to produce the maximum sustained acceleration?
BIO Hypergravity. At its Ames Research Center, NASA uses its large “20-G” centrifuge to test the effects of very large accelerations (“hypergravity”) on test pilots and astronauts. In this device, an arm 8.84 m long rotates about one end in a horizontal plane, and an astronaut is strapped in at the other end. Suppose that he is aligned along the centrifuge’s arm with his head at the outermost end. The maximum sustained acceleration to which humans are subjected in this device is typically 12.5g. (a) How fast must the astronaut’s head be moving to experience this maximum acceleration? (b) What is the difference between the acceleration of his head and feet if the astronaut is 2.00 m tall? (c) How fast in rpm (rev/min) is the arm turning to produce the maximum sustained acceleration?
A 20-G centrifuge at NASA is used to test the effects of very large accelerations or hypergravity on test pilots and astronauts. This centrifuge has an arm of 8.84 m long that rotates about one end in a horizontal plane, and the subject is strapped in at the other end. If the subject is aligned along the centrifuge’s arm with his head at the outermost end, and the maximum sustained acceleration to which humans are subjected in this device is typically 12.5g,
(a) how fast must the subject’s head be moving to experience this maximum acceleration? (b) What is the difference between the acceleration of his head and feet if the subject is 1.57 m tall?
NASA uses large centrifuges to study the effects of large forces on astronauts prior to their going into space. A subject in the 20-G centrifuge, which has a radius of 9.5 m, can have a centripetal acceleration as large as 20.0g, where g equals 9.81 m/s2. What is the tangential speed of the subject?
In the 1968 film 2001: A Space Odyssey, directed by Stanley Kubrick, some
spacefarers make the journey to Jupiter on the ship Discovery One.
ふてくさ
Inside the command module (the spherical dome at the front) there is a 10.86 m
diameter centrifuge, which spins to provide artificial gravity during the long journey.
If the centrifuge spins at a rate of 5.1 rotations per minute (rpm), how many g's would
this be equivalent to?
Hint: Earth's gravity is 1 g, where g = 9.8 m/s²; Discovery One's gravity would likely be
less than or equal to 1 g.
Chapter 3 Solutions
University Physics with Modern Physics, Volume 2 (Chs. 21-37); Mastering Physics with Pearson eText -- ValuePack Access Card (14th Edition)
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