When a planet revolves around the Sun,in gene | vedclass

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(D) When a planet revolves around the Sun,the gravitational force exerted by the Sun on the planet acts along the line joining them. Since the torque

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angular momentum about the Sun and areal velocity of the planet are constant.

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(D) When a planet revolves around the Sun,the gravitational force exerted by the Sun on the planet acts along the line joining them. Since the torque $\vec{	au} = \vec{r} 	imes \vec{F} = 0$,the angular momentum $\vec{L}$ of the planet about the Sun remains conserved. According to Kepler's second law,the areal velocity (area swept per unit time) is proportional to the angular momentum $(dA/dt = L/2m)$. Since the angular momentum $L$ and the mass $m$ of the planet are constant,the areal velocity remains constant.

When a planet revolves around the Sun,in general,for the planet:

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