Chapter 10, Problem 1RQ

Interpretation Introduction

Interpretation:

The poking of pencil hurts more than that of eraser even though same force is applied is to be explained.

Concept Introduction:

The pressure is the applied force per unit area. The mathematical expression for pressure is as follows:

$P=\frac{F}{A}$

Here, $P$ is the pressure, $F$ is the force applied, and $A$ is the area. The SI unit of pressure is ${\text{N/m}}^2$(newton per meter square) or $\text{Pa}$(pascal).