volume_mute
Match each physical condition of an object in the atmosphere to its corresponding vertical mechanical movement
publish date: 2026/05/20 22:17:27.630855 UTC
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Conditions
The total weight of the balloon system is greater than the weight of the displaced air
The total weight of the balloon system is exactly equal to the weight of the displaced air
The total weight of the balloon system is less than the weight of the displaced air
Movements
The balloon descends toward the ground
The balloon hovers stationary at a constant altitude
The balloon ascends higher into the sky
Correct Answer
(1) The total weight of the balloon system is greater than the weight of the displaced air,The balloon descends toward the ground
(2) The total weight of the balloon system is exactly equal to the weight of the displaced air,The balloon hovers stationary at a constant altitude
(3) The total weight of the balloon system is less than the weight of the displaced air,The balloon ascends higher into the sky
Explanation
If the downward weight exceeds the upward buoyant force, the net force is downward and the object sinks. When the two forces balance perfectly, it is in static equilibrium and hovers. If the buoyant force is greater, it accelerates upward.
Reference
Basic Physics: A Self-Teaching Guide