Q48 of 176 Page 101

Which is more fundamental, the mass of a body or its weight? Why?

The mass of a body is more fundamental because mass of a body is constant and does not change from place to place.


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46

A stone resting on the ground has a gravitational force of 20 N acting on it. What is the weight of the stone? What is its mass? (g = 10 m/s2).

 47

An object has mass of 20 kg on earth. What will be its (i) mass and (ii) weight, on the moon? (g on moon = 1.6 m/s2).

 49

How much is the weight of an object on the moon as compared to its weight on the earth? Give reason of your answer.

 50

Define mass of a body. What is the SI unit of mass?