Question

A stone thrown on a window pane breaks it,whereas a high speed Bullet make a clean hole throughout it. Explain? ​

Answer 1

• The velocity of stone is much less than that of the bullet fired from a gun. Due to its low speed the stone remains in contact with the window pane for a longer time and hence motion is shared by whole of the window pane.

• On the other hand, the bullet fired from gun, remains in contact with the window pane for such a small time that it shares its motion only with a portion of the window pane. That's why it makes a clean hole in the window pane.