Does the speed of a planet remain constant in | vedclass

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Question

(B) According to Kepler's Second Law,a planet sweeps out equal areas in equal intervals of time. For a planet in an elliptical orbit,the distance $r$

Vedclass · Accepted Answer

No

Vedclass · Answer

(B) According to Kepler's Second Law,a planet sweeps out equal areas in equal intervals of time. For a planet in an elliptical orbit,the distance $r$ from the Sun changes continuously. Since the angular momentum $L = mvr \sin(	heta)$ is conserved,the speed $v$ must change as $r$ changes. Specifically,the planet moves faster when it is closer to the Sun (perihelion) and slower when it is farther away (aphelion). Therefore,the speed of a planet is not constant in an elliptical orbit.

Does the speed of a planet remain constant in its orbit?

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