Stick three pins close together to the bottom of a cork and make the cork stand on the pins (figure (b) shown below). Now try to push or tilt the cork and see what happens. Remove the pins and fix on the cork as shown in figure (b) below. You will notice that in the new arrangement, the base has become broader. Now place the cork resting on the pins as legs and give it a slight tilt. Watch what happens. You will notice that in the first case, the cork topples down while in the second case, the cork comes back to the original position.