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Consider what happens when you push both a pin and the

Physics: Principles with Applications | 6th Edition | ISBN: 9780130606204 | Authors: Douglas C. Giancoli ISBN: 9780130606204 3

Solution for problem 4Q Chapter 10

Physics: Principles with Applications | 6th Edition

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Physics: Principles with Applications | 6th Edition | ISBN: 9780130606204 | Authors: Douglas C. Giancoli

Physics: Principles with Applications | 6th Edition

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Problem 4Q

Consider what happens when you push both a pin and the blunt end of a pen against your skin with the same force. Decide what determines whether your skin is cut—the net force applied to it or the pressure.

Step-by-Step Solution:

Solution 4Q:

        We have to explain the observation difference between pin and blunt end of a pen against your skin with the same force. And also to explain which factor is responsible for skin cut - net force applied or pressure.

Step 1 of 3</p>

Concept:

         Pressure on the body is defined as the force applied per unit cross-sectional area of the body. Mathematically,

                        

Step 2 of 3</p>

If net force is constant then,

This means that if the area is large, then the pressure is distributed over large area, and hence the effect is reduced and vice-versa.

The area of a blunt end of a pen is more than the tip of a pin, therefore the pin experiences more pressure than the pen tip.Thus, when the pin and blunt end of a pen is pressed against your skin with the same force, then  it pricks the skin.

Step 3 of 3

Chapter 10, Problem 4Q is Solved
Textbook: Physics: Principles with Applications
Edition: 6
Author: Douglas C. Giancoli
ISBN: 9780130606204

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Consider what happens when you push both a pin and the