astronauts use a centrifuge to simulate the acceleration of a rocket launch. the centrifuge take 20.0 seconds to reach top speed, which is 1 revolution per 1.20 seconds. the astronaut is strapped into a seat 5.50 m from the axis.
(a) what is the astronauts tangential acceleration during the first 20.0 s?
(b) how many g's of acceleration does the astronaut experience when the device is rotating at the top speed? each 9.80 m/s^2 of acceleration is 1g.