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Question

1. Weight of an object on the moon is 1/6th of its weight on the earth. True or False?
2. How much would a 70 kg man weigh on the moon? What would be his mass on the earth and on the moon? (Acceleration due to gravity on moon =1.63 m/s2
[3 MARKS]


Solution

Correct option: 1 Mark
Problem: 2 Marks

1.  True
2.  We will first calculate the weight of the man on the moon

Here, Mass of the man on moon, m = 70 kg

Acceleration due to gravity, g=1.63 m/s2
           (on the moon)

We know that:   W=m×g

So,                   W=70×1.63

                         W=114.1 N

Thus, the man would weigh 114.1 newtons on the moon. Please note that the mass of a body is constant everywhere in the universe. So, the mass of this man would be the same on the earth as well as on the moon, that is, the mass will be 70 kg on the earth as well as on the moon.

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