A sphere of iron and another of wood of the same radius are held under water. Compare the upthrust on the two spheres.

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Solution

Since the spheres have the same radius, both will have an equal volume inside water, and hence, the upthrust acted by water on both the spheres will be the same.
Hence, the required ratio of upthrust acting on two spheres is 1:1.

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A sphere of iron and another of wood of the same radius are held under water. Compare the upthrust on the two spheres.

Since the spheres have the same radius, both will have an equal volume inside water, and hence, the upthrust acted by water on both the spheres will be the same. Hence, the required ratio of upthrust acting on two spheres is 1:1.

Since the spheres have the same radius, both will have an equal volume inside water, and hence, the upthrust acted by water on both the spheres will be the same.
Hence, the required ratio of upthrust acting on two spheres is 1:1.