Question

What do you understand by the term upthrust of a fluid ? Describe an experiment to show its existence.​

Answer 1

Answer:

Following is an experiment that demonstrate the existence of upthrust: When an empty can, with its mouth scaled with an airtight stopper in a tub filled with water, it floats with a significantly larger portion of it above the water surface while only a small portion of it is presently below the water surface.

Explanation:

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Answer 2

Answer:

What do you understand by the term upthrust of a fluid? Describe an experiment to show its existence.

Medium

Solution

Upthrust is an upward force that acts on a body when it is partially or fully immersed in a fluid.

Following is an experiment that demonstrate the existence of upthrust:

When an empty can, with its mouth scaled with an airtight stopper in a tub filled with water, it floats with a significantly larger portion of it above the water surface while only a small portion of it is presently below the water surface.

If we try to push the can we feel an upward force opposing making it difficult to push further. In order to push it further, more force is required till it is immersed. Even when it is fully immersed, a constant force is still required order for it to remains static in the same position.

That is the maximum thrust on the can. At this position, if the can is released, it bounces back to the water surface and floats again.

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