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Chapter 10: Q9P (page 260)

(I) Estimate the pressure exerted on a floor by (a) a one-pointed heel of area = 0.45 cm2, and (b) one wide heel of area 16 cm2, Fig. 10–48. The person wearing the shoes has a mass of 56 kg.


Short Answer

Expert verified
  1. The pressure by the pointed heel is 6.097 × 106 N/m2
  2. The pressure by the wide heel is 1.71 × 105 N/m2

Step by step solution

01

Pressure exerted on a substance

The pressure exerted on a substance is equivalent to the product of the force acting on it and its area.

02

Given the data

The area of the pointed heel is A1= 0.45cm2.

The area of the wide heel is A2 = 16cm2.

The mass of the person m = 56 kg.

03

Calculation of pressure on the floor by a pointed heel

The force acting on one heel is taken as half the weight of the person.

The pressure by the pointed heel is calculated as;

Substitute the values in the above relation.

The pressure is 6.097 × 106 N/m2

04

Step-4: Calculation of pressure on the floor by a wide heel

The pressure by the wide heel is calculated as:


Substitute the values in the above relation.


The pressure is 1.71 × 105 N/m2.

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