Motion and Measurement of Distances
Non standard method of measurement
Go to a cricket ground with your friends. Measure the length of the cricket pitch using your foot span as the unit of measurement. Tell your friends to do the same and record the length of the pitch measured by each person. Is the measurement the same for everyone?
Measurement without standard scales:
Raju and Ravi fight frequently over who is taller. They decide to measure their heights by standing next to a wall and marking their heights.
They measure the height of each mark by using a gilli-danda to measure the distance between the foot of the wall and their respective marks.
It is found that Raju’s height is equal to two dandas and one gilli, whereas that of Ravi is equal to two dandas and two gillis. Hence, Ravi is taller than Raju. However, can you rely on such measurement? Does this type of measurement accurately determine their heights?
Measuring the length of a cricket pitch with the help of your foot span or measuring a person’s height with a gilli-danda are non-standard methods of measuring distances.
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