In what direction does the resultant of all normal pressure forces act___________________?
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Answer: C. vertically upwards
Explanation
Archimedes principle dictates that buoyant forces equal the displaced fluid weight acting upwards. The resultant normal pressure forces integrate to a single net upward force vector. This net vertical force acts directly through the geometric center of the submerged volume. Hydrostatic pressure increases linearly with depth based on fluid density and gravitational acceleration. Horizontal pressure forces on a completely submerged body always cancel out completely in equilibrium. The center of buoyancy corresponds precisely to the centroid of the displaced fluid volume.
Naval architects rely on buoyant force calculations to ensure ship stability and floating safety. Submarines manipulate ballast water to control vertical forces and achieve neutral underwater buoyancy. Hydraulic structures and submerged pipelines must withstand these exact calculated pressure distributions. Vertically downwards is the direction of gravitational weight forces rather than net pressure. The center of pressure applies to flat surfaces where shear and bending moments matter. Metacentre is a point used for stability analysis rather than the line of pressure action.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
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