In Act I scene 2 the relationship is more straightforward: Prospero is master and Ariel is servant. When Ariel pushes, reminding Prospero of the promise of liberty, he essentially shuts Ariel down.
By contrast, in Act V scene 1, the relationship is much more affectionate, and much more one of equals, or at least near-equals. Ariel speaks of what a human would feel, and the emphasis is on emotions, rather than power and hierarchy (and, of course, Prospero frees Ariel at the end of the play).
Explain how Shakespeare presents the relationship between Prospero and Areil?