A potter's wheel moves uniformly from rest to an angular speed of $0\mathrm{.}21$ rev$/$s in $31\mathrm{.}0$ s$.$

$($a$)$

Find its angular acceleration in radians per second per second.

rad$/$s$2$

$($b$)$

Would doubling the angular acceleration during the given period have doubled final angular speed?

YesNo$$