Answer:
a)  w = 31.4 rad / s,  b)  a = 118.4 m / s²
Explanation:
a) let's reduce to the SI system
  w = 5 rev / s (2pi rad / 1 rev)
  w = 31.4 rad / s
b) the expression for the centripetal acceleration is
   a = v² / r
linear and angular variables are related
   v = w r
  we substitute
   a = w² r
   a = 31.4² 0.120
   a = 118.4 m / s²
