Aballoon that weighs 1 n is suspended in air, drifting neither up nor down. how much buoyant force acts upon it? what happens if the buoyant force decreases? if the buoyant force increases? a balloon that weighs 1 is suspended in air, drifting neither up nor down. how much buoyant force acts upon it? what happens if the buoyant force decreases? if the buoyant force increases? 1 n; it rises; it sinks 0 n; it rises; it sinks 0 n; it sinks; it rises 1 n; it sinks; it rises