Question

Physics tells us that weights of an object on the moon is proportional to its weight on Earth. Suppose a $90$ kg man weighs $15$ kg on the moon what will a $60$ kg woman weigh on the moon?

Answer 1

Weight on Earth $\propto$ Weight on Moon

Weight on Earth $=k$ $\times$ Weight on Moon

Given:

Weight on Earth$=90kg$

Weight on Moon$=15kg$

As

Weight on Earth $=k$ $\times$ Weight on Moon

$k=\frac{90}{15}=6$

For a woman whose Weight on Earth$=60kg$

Weight on Earth $=6$ $\times$ Weight on Moon

$60=6\times$ Weight on Moon

Hence Weight on Moon$=\frac{60}{6}=10kg$