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Q1.

Expert-verified
Found in: Page 17

### Physics Principles with Applications

Book edition 7th
Author(s) Douglas C. Giancoli
Pages 978 pages
ISBN 978-0321625922

# What are the merits and drawbacks of using a personâ€™s foot as a standard? Consider both (a) a particular personâ€™s foot and (b) any personâ€™s foot. Keep in mind that it is advantageous that fundamental standards be accessible (easy to compare to), invariable (do not change), indestructible and reproducible.

a).

When we use a personâ€™s foot as a standard, it has both merits and demerits.

A personâ€™s foot is easy to reproduce for measurement. However, if that person dies or suffers from any illness, it may vary the foot size or even destroy the standard.

b).

When we use any person's foot as a standard, it has both merits and demerits. A standard unit that is in the form of a person's foot can be easily accessed. However, variations in foot sizes can make it difficult to be used as a standard and reproduce.

See the step by step solution

## Step 1: Merits of using a particular person’s foot as a standard

The merits of using a personâ€™s foot as a standard are as follows:

• It is easily reproducible.
• It is cheaper than other instruments of measurement.
• It is easily accessible even to the people of the lower economic section.

## Step 2: Demerits of using a particular person’s foot as a standard

The demerits of using a particular personâ€™s foot as a standard are as follows:

• The particular person will die ultimately, and then the standard will change.
• The foot size of the person will change with age.
• The foot size may also change due to temperature, among many other factors.

## Step 3: Merits of using any person’s foot as a standard

The merits of using any personâ€™s foot as a standard are as follows:

• It is easily accessible to all.
• It is cheaper than other instruments of measurement.
• It is within reach of all economic groups of society.

## Step 4: Demerits of using any person’s foot as a standard

The drawbacks of using any personâ€™s foot as a standard are as follows:

• Different people have different foot sizes.
• The foot size of a person changes with age.
• The foot sizes of men and women are different.