A 80kg astronaut is training in human centrifuge to prepare for a launch. The astronaut uses the centrifuge to practice having a 5.51g force (5.51 times their own weight) on their back. Number of forces: centripetal force: Are all forces balanced? (In plane of screen) How much force is acting on the astronaut's back? N What is the centripetal net force on the astronaut? N What is the astronaut's centripetal acceleration? m/s What is the astronaut's linear speed? m/s What distance would they travel during one revolution? m How long would it take them to complete one revolution? S V 19m