why-do-some-bodies-float-on-the-surface-of-water-while-some-other-bodies-are-fully-submerged-while-floating?explain-the-basic-principle-of-floatation?

If the density of the body is less than the water it will float othervise it will sink.

 

When a body is dipped in water , it displace some water , the displaced water try to regain its place and acts a upthrust on the body . This force is known as buoyant force , it is equal to the weight of the displaced liquid.