A satellite S moves around a planet P in an elliptical orbit as shown in figure. ratio of speed of s

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7.Gravitation

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A satellite $S$ moves around a planet $P$ in an elliptical orbit as shown in figure. The ratio of the speed of the satellite at point $a$ to that at point $b$ is

A

$1 : 9$

B

$1 : 3$

C

$1:1$

D

$3:1$

Solution

$\mathrm{L}_{\mathrm{a}}=\mathrm{L}_{\mathrm{b}}$

$\mathrm{mv}_{2} \mathrm{r}=3 \mathrm{mv}_{\mathrm{b}} \mathrm{r}$

$\Rightarrow \frac{\mathrm{v}_{\mathrm{a}}}{\mathrm{v}_{\mathrm{b}}}=3: 1$

Standard 11

Physics

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