Answer
(a) v = 196 m/s
(b) $a_R = 1150~g$
Work Step by Step
(a) $v = (550~rev/min)(\frac{1~min}{60~s})(2\pi\cdot 3.40~m/rev)$
$v = 196~m/s$
(b) $a_R = \frac{v^2}{R} = \frac{(196~m/s)^2}{3.40~m}$
$a_R = 11,300~m/s^2$
$a_R = \frac{11,300~m/s^2}{9.80~m/s^2} = 1150~g$