If Zarina is standing at the base of a hill and Flynn is walking halfway up the hill with a helium balloon tied to his wrist, what happens to the balloon if the string breaks due to a sudden gust of wind? Respond very briefly.
If the string breaks, the helium balloon, which is less dense than air, will rise upward due to buoyant force. The gust of wind may push it horizontally as well, but regardless of the wind's direction, the balloon will move upwards away from Flynn and continue to ascend until external forces such as higher wind currents or obstacles alter its path. Zarina, observing from the base of the hill, would see the balloon drift upwards and potentially away from the hill depending on the wind's direction.