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Question
according to kepler’s second law, where in a planets orbit would it be moving fastest?
○ when it is closest to the sun
○ when it is farthest from the sun
○ planets orbit at a constant speed.
where would it be moving slowest?
○ when it is closest to the sun
○ when it is farthest from the sun
○ planets orbit at a constant speed.
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For "Where would it be moving fastest?":
Kepler's second law (law of equal areas in equal time) implies a planet moves faster when closer to the Sun (perihelion) as it needs to cover more arc length to sweep equal area. So the correct option is "when it is closest to the Sun".
By Kepler's second law, a planet moves slowest when farthest from the Sun (aphelion) since it covers less arc length to sweep equal area. So the correct option is "when it is farthest from the Sun".
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when it is closest to the Sun