An astronaut is being tested in a centrifuge. The centrifuge has a radius of 7 m and, in starting, rotates according to ? = 0.30t2, where t is in seconds and ? is in radians.
a) When t = 5.0 s, what is the magnitude of the astronaut's angular velocity? rad/s
b) When t = 5.0 s, what is the magnitude of the astronaut's linear speed? m/s
c) When t = 5.0 s, what is the magnitude of the astronaut's tangential acceleration? m/s2 (d) When t = 5.0 s, what is the magnitude of the astronaut's radial acceleration? m/s2