Drill bits, rotatable cutting structures, cutting structures having adjustable rotational resistance, and related methods

An earth-boring tool, comprising:

• a body;
• a plurality of rotatable cutting structure assemblies coupled to the body, each rotatable cutting structure assembly of the plurality of rotatable cutting structure assemblies comprising:
• a leg extending from the body;
• a rotatable cutting structure rotatably coupled to the leg;
• and
• a resistance actuator configured to impose rotational resistance on the rotatable cutting structure relative to the leg;
• and
• a plurality of blades coupled to the bit body.

A method of drilling a borehole, comprising:

• rotating an earth-boring tool within the borehole;
• causing rotational resistance to be imposed on at least one rotatable cutting structure of the earth-boring tool to alter a speed of rotation of the at least one rotatable cutting structure;
• causing a portion of the earth-boring tool to be pushed into a sidewall of the borehole responsive to the rotational resistance imposed on the at least one rotatable cutting structure;
• and
• side cutting the sidewall of the borehole with the portion of the earth-boring tool.