Question

explain how a karate player can break a pile of tiles with a single blow of his hand

Answer 1

He strikes the tiles woth his hand very very fast producing an extremely large momentum..

Answer 2

The karate player strikes the pile of tiles with his hand very fast. In doing so, the large momentum of fast moving hand is reduced to zero in a very short time. This exerts a very large force on the pile of tiles which is sufficient to break them.

Hope it's help uh...