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Question

If a man weighs 70 kg what will his weight be on moon?

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Solution

Actually,
in the question the given quantity is the mass of the man and not the weight
because unit of weight is N and unit of mass is Kg

As mass is same everywhere so the man would weigh 70 kg on moon as well as on earth.

acceleration due to gravity(g)=9.8 m/s2

Weight of man on earth(We)=mg

=70*9.8

=686 N

Weight of man on moon(Wm)=686/6
because the acceleration due to gravity of moon is 1/6 th of acceleration due to gravity of earth

=114.34 N (approx.)


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