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An astronaut is being tested in a centrifuge. the centrifuge has a radius of 9 m and, in starting, rotates according to ? = 0.30t2, where t is in seconds and ? is in radians.
(a) when t = 9.0 s, what is the magnitude of the astronaut's angular velocity?
(b) when t = 9.0 s, what is the magnitude of the astronaut's linear speed?
(c) when t = 9.0 s, what is the magnitude of the astronaut's tangential acceleration?
(d) when t = 9.0 s, what is the magnitude of the astronaut's radial acceleration?
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