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28 Nov 2021
Given information
Explanation:
The net force is the same in both the pin and pen instances. The pressure will be substantially higher because the pin's force is concentrated over such a small region of skin contact. As a result, the pin has a higher chance of puncturing the skin.
Because the blunt end of the pen has a larger surface area, the force is dispersed evenly. However, when using a pin, all of the force is centered at the pin's point. It can cut skin, and the amount of pressure applied determines whether or not the skin is cut.
Step-by-step explanation
Step 1.
The sharp end of the pin (with a smaller area) will pierce the skin when pressed with a specific minimum force, whereas the same force applied to pressing the blunt end of the pen (with a larger area) into the skin will not pierce the skin. As a result, pressure determines whether the skin is penetrated (force per unit area).
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Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922