The motion of planets in the solar system is | vedclass

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(C) The gravitational force exerted by the Sun on a planet is a central force. $A$ central force is always directed towards or away from a fixed point

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Conservation of angular momentum

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(C) The gravitational force exerted by the Sun on a planet is a central force. $A$ central force is always directed towards or away from a fixed point (the center of the Sun). The torque $\vec{	au}$ exerted by a central force about the center of force is given by $\vec{	au} = \vec{r} 	imes \vec{F}$. Since the force $\vec{F}$ is parallel to the position vector $\vec{r}$,the cross product $\vec{r} 	imes \vec{F} = 0$. Because the torque is zero,the angular momentum $\vec{L}$ of the planet remains constant over time. Therefore,the motion of planets in the solar system is governed by the law of conservation of angular momentum.

The motion of planets in the solar system is governed by which of the following conservation laws?

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