Question

Why does a body float or sink when placed on a surface of water ?

Answer 1

When a body is partly or wholly immersed in a fluid, the fluid exerts an upward force on the body. This phenomenon is called buoyancy.

The upward force experienced by a body when partially or wholly immersed in a fluid is called upthrust or buoyant force.

A body sinks in a liquid if its density is more than that of the liquid. A body floats in a liquid if its density is less than that of the liquid

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Answer 2

Hey mate ☺

QuesTion -

Why does a body float or sink when placed on a surface of water ?

Answer-

When buoyant force is equal to the weight of object, tjen object floates on water. And when buoyant force is less than the object, it sinks in water.

Hope it helps you☺✌✌