Question

when we throw a wood block on water why it is flows

Answer 1

because it weighs less than amount of water it would have to push out of the glass if it sank. Wood, cork, and ice are all less dense than water, and theyfloat; rocks are more dense, so they sink

Answer 2

Beacuse the weight of the water displaced by the wood is less than the weight of the wood and beacuse of its shape.