A planet is revolving ground the sun in an elliptical orbit. Its closest distance from the sun is $r_{min}$, the farthest distance from the sun is $r_{max}$. If the orbital angular velocity of the planet when it is the nearest to the sun is $\omega $, then the orbital angular velocity at the point when it is at the farthest distance from the sun is
$\sqrt {\frac{{{r_{min}}}}{{{r_{\max }}}}} \,\omega $
$\sqrt {\frac{{{r_{\max }}}}{{{r_{\min }}}}} \,\omega $
$\frac{{{r^2}_{\max }}}{{{r^2}_{\min }}}\,\omega $
$\frac{{{r^2}_{min}}}{{{r^2}_{\max }}}\,\omega $
A geostationary satellite is orbiting the earth at a height of $6\,R$ above the surface of earth ($R$ is the radius of earth). The time period of another satellite at a height of $2.5\,R$ from the surface of the earth is :-
If the radius of earth shrinks by $1.5 \%$ (mass remaining same), then the value of gravitational acceleration changes by ......... $\%$
A satellite $S$ is moving in an elliptical orbit around the earth. The mass of the satellite is very small compared to the mass of the earth. Then
Two spheres of masses $m$ and $M$ are situated in air and the gravitational force between them is $F$ . the space around the masses is now filled with a liquid of specific gravity $3$ . The gravitational force between bodies will now be
Starting from the centre of the earth having radius $R,$ the variation of $g$ (acceleration due to gravity) is shown by