Question:
The minimum and maximum distances of a planet revolving around the Sun are $x_{1}$ and $x_{2}$. If the minimum speed of the planet on its trajectory is $v_{0}$ then its maximum speed will be :
Correct Option: , 4
Solution:
Angular momentum conservation equation
$\mathrm{V}_{0} \mathrm{X}_{2}=\mathrm{V}_{1} \mathrm{X}_{1}$
$\mathrm{~V}_{1}=\frac{\mathrm{V}_{0} \mathrm{X}_{2}}{\mathrm{X}_{1}}$