To support a movable arm (11) attached to a base (10) and rotatable around a movable rotation point (13) relative to the base, a force-balancing support (4) comprises an arm attachment (41) connectable to the movable arm and at least rotatable around a centre of rotation (43) of which a position is movable relative to the base attachment (42). The support is attachable to the base with a base attachment (42) at a distance from the arm attachment. The support has a cantilever mechanism (44) which transfers force exerted on the arm attachment (41) by the movable arm (11), when coupled thereto, to the base attachment. The cantilever mechanism has a fixed end (45) attached to the base attachment and a free, arm-side, cantilever end (44) movable, e.g. by suitable flexing. The arm attachment is suspended with respect to the base attachment at the free end.
