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Consider motion of a planet in elliptical path around the sun. Select correct alternative(s)

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Time taken by planet to move from point A to B is equal to time taken by planet to move from point D to A

Time taken by planet to move from point B to C is equal to time taken by planet to move from point D to A

Time taken by planet to move from point C to D is greater than time taken to move from point D to A

Angular momentum of planet about the centre of sun remains conserved throughout the motion

answer is A, C, D.

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Detailed Solution

Since $Δ B S A = Δ D S A \Rightarrow {t_{A}}_{\to B} = t_{D \to A}$
Similarly $Δ C S D = Δ D S A \Rightarrow {t_{C}}_{\to D} = t_{D \to A}$

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