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A solid object is fully submerged in a liquid. The net 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 of the liquid
4. be in the vertically upward direction

Correct answer: be in the vertically upward direction

Solution

The net force from the liquid is the buoyant force, equal to the weight of displaced liquid and directed vertically upward (acting at the center of buoyancy). For a fully submerged body it depends only on the displaced volume, not on depth or orientation, so it does not change when pushed deeper or rotated. It only changes (decreases) when part of the body is taken out, but the directional statement 'vertically upward' is the always-true description of the net liquid force.

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