Sources say that the governor has 'set the wheels in motion' for a run for the presidency. [=the governor has started to run for president]
They will be taking steps to 'set/put' the divorce proceedings 'in motion'. [=to begin the divorce proceedings]
She made a 'motion' that the meeting (should) be adjourned. = She made a 'motion' to adjourn (the meeting).
(..) You must come to Minas Tirith by another road. Follow the river. Look to the black ships. Understand this: Things are now in motion that cannot be undone. I ride for Minas Tirith... ...and I won't be going alone. Of all the inquisitive Hobbits, Peregrin Took, you are the worst. (..)2003 The Lord of the Rings: The Return of the King