PART A)
mass of the monster = 60 kg
radius = 3 m
frequency = 9 rev/min = 9/60 rev/s
now we can find the angular speed as


now the acceleration is given by


PART B)
now as per Newton's law we have

from above all values we have

Part C)
now monster moves inside at radius R = 1 m
so now centripetal acceleration is given as


now the force experience by monster

