THE PRACTICE STUDIO
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PRACTICE / Buoyancy
What is the net force on a submerged block?
A sealed rigid block of volume 0.003 m³ and average density 800 kg/m³ is held completely underwater, then released from rest. Water density is 1000 kg/m³ and g = 10 m/s².
What is the net force immediately after release?
Organize the givens & assumptions
- Block volume: 0.003 m³
- Block density: 800 kg/m³
- Water density: 1000 kg/m³
The block is fully submerged, away from boundaries. Neglect surface tension and any dynamic fluid forces; use the elementary hydrostatic buoyancy model.
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