Question

coin is smaller than ship but coin sinks in water and ship float on water.why?

Answer 1

because of the density

A thing will float if its average density is less than the density of water.Although the ship's hull may be made of iron, the ship also has a lot of lighter things (including a lot of air) inside it. ... The coin weighs more than the water it displaces therefore it sinks.
so ,coin is smaller than ship but coin sinks in water and ship float on water

Answer 2

beacause ship's have more floating force than water vut coin does not have more like ship so it sinks in water