Which of the following statements is true about an object that is neutrally buoyant in a fluid?2 marksIts weight is zeroIt displaces its own volume of fluidIts density is equal to the density of the fluidIt sinks to the bottom
Question
Which of the following statements is true about an object that is neutrally buoyant in a fluid?2 marksIts weight is zeroIt displaces its own volume of fluidIts density is equal to the density of the fluidIt sinks to the bottom
Solution
The true statement about an object that is neutrally buoyant in a fluid is: "Its density is equal to the density of the fluid".
Here's why:
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"Its weight is zero": This is not true. The object does have weight, but it is exactly balanced by the buoyant force of the fluid, which is why it neither sinks nor floats.
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"It displaces its own volume of fluid": This is a principle of buoyancy, but it doesn't necessarily mean the object is neutrally buoyant. An object can displace its own volume of fluid and still sink or float depending on its density relative to the fluid.
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"Its density is equal to the density of the fluid": This is true. When an object is neutrally buoyant, it means its density is equal to the density of the fluid it's in. This is why it neither sinks nor floats.
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"It sinks to the bottom": This is not true. If an object sinks to the bottom, it is not neutrally buoyant. It is denser than the fluid it's in.
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