Question

On the surface of the earth, force of gravitational attraction between two masses kept at distance $d$ apart is $6Newtons$. If these two masses are taken to the surface of the moon and kept at the same distance $d,$ the force between them will be:

• A. 1N
• B. 36N
• C. $\frac{1}{6}$N
• D. 6N

Answer 1

The correct option is D 6N

By Universal law of gravitation, force of gravitational attraction between two masses kept at distance $d$ apart is

apart

$F_g=G\frac{m_1{m}_2}{d^2}=6N$

Gravitational force according to this law must remain the same even on the moon's surface, because none of the parameters $m_1,m_2$ and $d$ are changed. Since $G$ is universal gravitation constant. So $G$ is also constant, as the name suggest.

So, the force of gravitational attraction between them on moon's surface is still $6N.$

Hence, $\left(D\right)$ is correct.