Why does a glass window pane cracks when hit by a stone?
Why does a bullet fired against window pane glass makes a neat hole, but the pane does not crack?
Why a glass pane of a window is shattered when a flying pebble hits it?
A clean hole is made in a glass window pane when it is struck by a bullet fired from a gun. Whereas, the same window pane will be broken to pieces when struck by a stone of similar size. Explain the phenomenon quoting the relevent priciples.