A centrifuge consists of a container held at a distance of 0.20 m from its axis. When turned on the centrifuge spins the container and its contents round at 9000 revolutions per minute. a) Find its angular velocity, b) A small mass of 10 g is placed in the drum. Work out what force will need to be provided for it to go round at that rate in a circle of radius 0.20 m.