Can't move apply_body_force

I’m Isaac sim beginner.
I want to make simple simulation which moving cylinder pushing cube.
I can create cylinder & cube on VScode, but I can’t understand apply_body_force.

############################################
dc = _dynamic_control.acquire_dynamic_control_interface()

    rigid_body = dc.get_rigid_body("fancy_cylinder")       
    dc.apply_body_force(rigid_body, carb._carb.Float3(3,0,0),carb._carb.Float3(0,0,0))

############################################

In this cord mistaken?
Why did’nt add force to cylinder?

Please help me, or tell me other methods which add force to cylinder.
Thanks.