Define acceleration due to gravity. Give the magnitude of $g$ on the surface of earth.

Two planets $A$ and $B$ have same mass and radii $(R)$ . The variation of density of the planets with distance from centre is shown in the following diagrams. The ratio of acceleration due to gravity at the surface of the planets $A$ and $B$ will be

The height at which the weight of the body become $\frac{1}{9}^{th}$. Its weight on the surface of earth (radius of earth $R$)

Weight of a body of mass $m$ decreases by $1\%$ when it is raised to height $h$ above  the Earth's surface. If the body is taken to a depth $h$ in a mine, then its weight will

A satellite revolves in the geostationary orbit but in a direction east to west. The time interval between its successive passing about a point on the equator is ........ $hrs$

The percentage decrease in the weight of a rocket, when taken to a height of $32 km$ above the surface of earth will, be$.....\%$

(Radius of earth $=6400\,km$ )