Kepler's second law of planetary motion states that the radius vector from the Sun to a planet sweeps out equal areas in equal times. This relationship is a consequence of which of the following conservation principles?

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Kepler's second law is a consequence of the conservation of angular momentum. As a planet moves closer to the Sun, its speed increases to maintain the conservation of angular momentum, causing it to sweep out more area in a given time. As it moves further away, its speed decreases, causing it to sweep out less area in the same amount of time.

Kepler's Second Law of Planetary Motion States That the Radius