Aplanet of mass $m$ is in an elliptical orbit about the sun $(m < < M_{sun})$ with an orbital period $T.$ If $A$ be the area of orbit, then its angular momentum would be :
$\frac{{2mA}}{T}$
$mAT$
$\frac{{mA}}{2T}$
$2mAT$
Two planets at mean distance ${d_1}$ and ${d_2}$ from the sun and their frequencies are $n_1$ and $ n_2$ respectively then
The distance of neptune and saturn from sun are nearly ${10^{13}}$ and ${10^{12}}$ meters respectively. Assuming that they move in circular orbits, their periodic times will be in the ratio
Suppose the law of gravitational attraction suddenly changes and becomes an inverse cube law i.e. $F \propto {1\over r^3}$, but still remaining a central force. Then
A satellite is orbiting the earth in a circular orbit of radius $r.$ Its
A body revolved around the sun $27$ times faster then the earth what is the ratio of their radii