The occupant inside a rotating space habitat
of the future feels that she is being pulled by
artiﬁcial gravity against the outer wall of the
habitat (which becomes the ﬂoor).
Which statement is false?

1. centrifugal force forces her to move in a circular path
2. at every moment her tendency is to move in a straight line path
3. the floor provides the centrifugal force to keep her moving in a circular path
4. the floor intercepts her path and presses against her feet

Question

The occupant inside a rotating space habitat 
of the future feels that she is being pulled by 
artiﬁcial gravity against the outer wall of the 
habitat (which becomes the ﬂoor). 
Which statement is false? 

1. centrifugal force forces her to move in a circular path
 2. at every moment her tendency is to move in a straight line path
 3. the floor provides the centrifugal force to keep her moving in a circular path
 4. the floor intercepts her path and presses against her feet

jfraser · Answer

any reference to "centrifugal" forces is automatically incorrect; they don't actually exist

agent0smith · Answer

It seems like option 3 should say "centripetal force" not centrifugal, because the floor does provide the centripetal force. That would make 1 the only false statement - since it only asks "which statement is false" not "which statements are false". 

As is, both 1 and 3 are false. 2 and 4 are true.