### Angular Momentum

An astronaut is being tested in a centrifuge. The centrifuge has a
radius of 10.4m and in starting, rotates according to $\phi=(0.326\: rad/s^{2})$
. When $t=5.60s$ what are the astronaut's (a) angular speed, (b)
tangential speed, (c) tangential acceleration and (d) radial acceleration?