Question

HEYA!!

why the tip of a needle is sharp ?

NO SPAMS❌​

Answer 1

Answer :

➡ The tip of a needle has very less area .

➡ We know that pressure is inversely proportional to area and hence due to less area , the pressure will be concentrated in a small area .

➡ Hence the small tip of the needle will exert a huge pressure and hence the needle tip is sharp .

Explanation :

↪ Pressure is defined as the force exerted per unit area .

↪ Hence the formula of pressure is given by :

$\mathtt{Pressure=\dfrac{Force}{Area}}$

↪ Pressure is hence inversely proportional to area if force is constant .

↪ If force is constant then remember the following :

▶ If area is increased the pressure decreases .

▶ If area is decreased the pressure increases .

↪ Hence an object with less area at any point will exert much pressure at that point .

Answer 2

Answer:

The tip of a sewing needle is sharp so that due to its sharp tip, the needle may put the force on a very small area of the cloth, producing a large pressure sufficient enough to pierce the cloth being stitched.