Question

A man weighs $600N$ on earth. What would be his approximate weight on moon?

• A. $100$ $N$
• B. $200$ $N$
• C. $50$ $N$
• D. $600$ $N$

Answer 1

The correct option is A $100$ $N$

Weight on earth = $600N$

Let $g=$ $10m/s^2$ on earth
Mass on earth = $\frac{600}{10}=60kg$

Now, since mass is a constant quantity so, it will remain $60kg$ on the moon also.
Now, weight on moon = $m{g}^{\prime }$

$m=$ mass $=60kg$

$g^{\prime }$ = acc. due to gravity on moon = ${\frac{1}{6}}^{th}$ the value on earth

So, Weight on moon = ${\frac{1}{6}}^{th}$ of the weight on earth

$\Rightarrow$ Weight on the moon $=600\times \frac{1}{6}=100N$