A drawing pin has a sharp point at one end and a large flat head at the other end because the area of the drawing pin is very small at the sharp end which results in the great amount of pressure force that is necessary for its functioning, on the other side of the drawing pin area of the large flat head is considerably large which results in less amount of pressure force on the thumb using the drawing pin.
What is pressure?
The total applied force per unit of area is known as the pressure.
The pressure depends both on externally applied force as well the area on which it is applied.
The mathematical expression for the pressure
Pressure = Force /Area
Therefore, A drawing pin has a sharp point at one end and a large flat head at the other end.
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