Q49 of 176 Page 101

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

The weight of an object on the moon is about one-sixth of its weight on the earth. This is because the value of acceleration due to gravity on the moon is about one-sixth of that on the earth.


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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).

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

 50

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

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