Question

If an object weighs 80 N on earth, then find out its weight on moon.Take g on earth $=10m{s}^{-2}$

• A. 10 N
• B. 40.33 N
• C. 13.33 N
• D. 80 N

Answer 1

The correct option is C

13.33 N

Weight of object on earth = 80 N

We know, weight = mass $\times$ acceleration due to gravity

mass $=\frac{\text{weight}}{\text{gravity}}=\frac{w}{g}$

mass $=\frac{80}{10}=8kg$

Now, gravity on moon $=\frac{1}{6}$ gravity on earth.

So gravity on moon $=\frac{1}{6}\times 10=\frac{10}{6}m{s}^{-2}$

Weight on moon = mass $\times g_{\text{moon}}$

$=8\times \frac{10}{6}=13.33N$