Figure shows the orbit of a planet $P$ round the sun $S.$ $AB$ and $CD$ are the minor and major axes of the ellipse.
If $t_1$ is the time taken by the planet to travel along $ACB$ and $t_2$ the time along $BDA,$ then
$t_1 = t_2$
$t_1 > t_2$
$t_1 < t_2$
nothing can be concluded
When a body is taken from pole to the equator its weight
If $M$ is mass of a planet and $R$ is its radius then in order to become black hole [ $c$ is speed of light]
The rotation of the earth having $R$ radius about its axis speeds up to a value such that a man at latitude angle $60^o$ feels weightlessness. The duration of the day in such a case is.
The orbital velocity of an artificial satellite in a circular orbit very close to earth is $v$. The velocity of a geo-stationary satellite orbiting in circular orbit at an altitude of $3R$ from earth's surface will be
The height at which the weight of a body becomes $1/16^{th}$, its weight on the surface of earth (radius $R$), is