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A block of material X and a block of Iron have equal volumes. The block X...

A block of material X and a block of Iron have equal volumes. The block X submerges in water while the iron sinks in water. Which has the greater buoyant force on it?

X

They have equal buoyant forces on them

Iron

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Answer #1

Let's say both of the blocks have volume of V.

The density of water is =

(i) Buoyant force on the block X:

As block X is submerged in water, all of its volume is in water.

So, buoyant force on it is = V g

(ii) Buoyant force on the iron block:

Amount of volume of the iron block in the water is also V.

So, buoyant force on it is also = V g

Then, they have equal Buoyant force on them.

Buoyant force depends on the amount of volume of the block inside the water and the density of water.

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