Thursday, December 1, 2011

Secret of bed of nails

Why Ballon does not blast when pressed on bed of nails ?


When a ballon is brought near the sharp edge of nail , it will break. But when we press a balloon on the bed of nails it will not break.

The reason is based on the simple principle
Pressure  = Force/Area

In the first case , area of the tip of nail is small and all the pressure acts on that tip resulting in breaking of balloon. In the second case we have a bed of nails , Here area increases and pressure per unit area on the balloon decreases resulting in non breaking of balloon.

This phenomenon is observed in many examples in our daily lifes

 
                      Snow skating

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