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Gravitational force on the surface of the moon is only $\frac{1}{6}$ as strong as gravitational force on the earth. What is the weight in newtons of a $10\ kg$ object on the moon and on the earth?
Given: Mass of the object $m=10\ kg$
To do: To find the weight of the object on the moon and on the earth.
Solution: We know that $W=mg$
Here, $W\rightarrow$ Weight of the object
$m\rightarrow$ mass of the object
$g\rightarrow$ acceleration due to gravity
Therefore, Weight on the moon, $W_{moon}=mg_{moon}$
$=10\ kg\times 9.8\times\frac{1}{6}$ [$g$ on the moon is one sixth of $g$ on earth.]
$=16.33\ N$
And now, weight on earth, $W_{earth}=mg_{earth}$
$=10\times 9.8$
$=98\ N$
Thus, weight of the object on moon is $16.33\ N$ and on the earth is $98\ N$.