Name: Pendulum: Measurement of Time
Uploaded: 2019-07-19
Duration: 3 min 15 s
Description: Machines have made our lives simple by reducing our effort. How are machines classified? What are some simple machines we use in everyday life? Let's explore.

Question

Would it be convenient to use the unit metre to measure larger lengths, such as the length of a railway track between two cities, or to measure smaller lengths, such as the thickness of a page of a book?

Accepted Answer

It wouldn’t be convenient to use the metre unit for very large or very small lengths.

For larger lengths, such as the length of a railway track between two cities, it’s more practical to use units like kilometres (km), since 1 kilometre is equal to 1,000 metres. This avoids dealing with large, unwieldy numbers.

For smaller lengths, such as the thickness of a page of a book, millimetres (mm) or micrometres (µm) are more convenient. 1 millimetre equals 0.001 metres, allowing for precise measurements of small dimensions without using decimals or fractions of a metre.

Kilometres (km) for large distances like railway tracks

Millimetres (mm) or micrometres (µm) for tiny measurements like page thickness

This makes measurements more practical and easier to interpret.

Exercise 1

NCERT Science Solutions for Exercise 1

Questions from Exercise 1 with Hints & Solutions

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