The orbital period of a geostationary satellite is (in $\,h$)

$A$ satellite is moving around the earth with speed $v$ in a circular orbit of radius $r$. If the orbit radius is decreased by $1\%$,its speed will

At which height from the surface of the Earth does a polar satellite revolve around the Earth?

$A$ satellite is orbiting the earth in a circular orbit of radius $r$. Which of the following is true?

$A$ planet of mass $m$ moves in an elliptical orbit around an unknown star of mass $M$ such that its maximum and minimum distances from the star are equal to $r_1$ and $r_2$ respectively. The angular momentum of the planet relative to the centre of the star is

$A$ ball is dropped from a spacecraft revolving around the earth at a height of $120 \, km$. What will happen to the ball?