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1. Write the need of a standard unit.
Many of the ancient systems of measurement were based on the dimensions of human body. As a result, unit of measurement varied from person to person and also from location to location. In earlier time, were used by people from different countries.
But, at the end of the Second World War there was a necessity to use worldwide system of measurement. Hence, SI () system of units was developed and recommended by in for international usage.
(i) What it is?
Mass is the .
The weight of an object is relevant to the .
(ii) Is it changeable?
The mass of an object
Weight .
(iii) Quantity
The mass is the .
The weight is the .
(iv) Scalar/Vector:
The mass is the .
Weight is the .
(v) How can you measure it?
The mass is measured by the instrument.
Weight is measured using a instrument.
(vi) Unit:
Mass -
Weight -
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