Question

dried leaves ______ on surface of water​

Answer 1

Answer:

dried leaves float on surface of water

Answer 2

The dried leaves float on surface of water.

Why the objects sink or flow when placed on the surface of a fluid?

When an object is placed on the surface of a fluid, the following two forces act on the object :

• The weight , W = mg of the object acting vertically downwards.

• The buoyant force in the upward direction.

Depending on the magnitudes of the above two forces three situations are possible :

• If weight is greater than the buoyant force then the object will sink.

• If weight and buoyant force both are same then the object will neither sink nor float, but it will fully immerse in the fluid.

• If buoyant force is greater than weight then the object will float.