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force and pressure
Weight of two pieces of aluminum and iron are 22 gram and 80 gram respectively. Both the pieces have equal volume. A decrease of 10 gram out weight appers on dipping the aluminum piece in water. What amount of buoyant force will be exerted in the iron piece, if it is dipped in water by suspending through a thread???
The more a body is immersed in water, the more the weight of the body decreases. The weight of the body is least when it is completely immersed in water. This means that loss in weight of the body increases as it is completely immersed in water.
When a body is partly or completely immersed in water (or any other liquid), then:
Loss in weight of body = Weight of water (liquid) displaced by the body = Buoyant force or upthrust exerted by water (any liquid) on the body.
Here, 10 g weight decreases when aluminium is dipped in water.
So, Bouyant force = loss in weight of aluminium = 10 g
Hence, 10 g weight will decrease in iron on dipping in water by suspending through thread.