If the mass of a body is $M$ on the Earth's surface,then the mass of the same body on the Moon's surface is:

Are the inertial mass and gravitational mass of a body different from each other?

The distance between the centres of the moon and the earth is $D$. The mass of the earth is $81$ times the mass of the moon. At what distance from the centre of the earth will the net gravitational force on a test mass be zero?

$A$ mass $M$ is split into two parts,$m$ and $(M-m)$,which are then separated by a certain distance. What ratio of $\frac{m}{M}$ maximizes the gravitational force between the two parts?

$A$ black hole is a:

Two identical solid copper spheres of radius $R$ are placed in contact with each other. The gravitational attraction between them is proportional to