Ch – 10 Motion And Measurement Of Distances

Priya's Learning Centre

  • Long ago people did not have any means of transport.
  • They used to move only on foot and carry goods on their back.
  • Later on they began to use animals for transportation.
  • Invention of the wheel made a great change in modes of transport.
  • The invention of steam engine led to the development of new means of transport.

  • The early years of 1900 saw the development of aeroplanes.
  • Measurement means the comparison of an unknown quantity with some known quantity.
  • The fixed quantity is known as unit.
  • Hand span, foot span, cubit are some of the ancient methods of measurement and are unreliable.

  • A cubit as the length from the elbow to the finger tips was used in ancient Egypt.
  • People also used the “foot” as a unit of length in different parts of the world.
  • People measured a “yard” of cloth by the distance between the end of the…

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Published by Priya Prakash

In the midst of winter, i found there was within me an invincible summer ~ Albert Camus

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