If a fish makes itself denser, it will sink; if it makes itself less denser, it will rise. In terms of buoyant force, why is it so ?
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Explanation:
The buoyant force upward is equal to the weight of displaced water, which is proportional to the volume of the fish:
FB=gwV
where g is 9.8m/s2 and w is the density of the water.
The downward force of gravity is proportional to the mass of the fish:
FG=−gM
The total of these forces is
F=FB+FG=gwV−gM
which is the same as
F=gV(w−ρ)
where ρ=M/V is the density of the fish. So if the fish is denser than water, the net force is downward, and if the fish is less dense than water, the net force is upward.
The answer to your question “why is this so?” must then be that the fish is exactly as dense as the water it's swimming in.please mark me as brainlist.
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