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Fluid Mechanics — Physics STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 SciencePhysicsFluid Mechanics1 Mark
Question
A solid is completely immersed in a liquid. The force exerted by the liquid on the solid will.
  1. Increase if it is pushed deeper inside the liquid.
  2. Change if its orientation is changed.
  3. Decrease if it is taken partially out bf the liquid.
  4. Be in the vertically upward direction.
✓

Answer

  1. Decrease if it is taken partially out of the liquid.
  1. Be in the vertically upward direction.
Explanation:
The force exerted by the liquid on the solid is the vertically upward force (buoyant force) that opposes the weight of the immersed solid.​ As more and more volume
Of the Solid is immersed in the liquid, the buoyant force increases.
Buoyant force depends on the weight of the displaced liquid. So, maximum upward buoyant force acts on the solid when it is completely immersed in the liquid. It
Decreases if the solid is taken partially out of the liquid. Once the object is immersed in the liquid, then pushing it further in the liquid does not increase the
buoyant Force.

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